Questions tagged [biology]

For questions about the biology of a pet. It's physical attributes.

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52 views

What are the effects of an all meat diet in cats? [duplicate]

Is there any harm in this or do I need to add nutrition to the diet? Also, how long would the health effects of a harmful diet take to appear and what are these, if any?
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1answer
72 views

How to increase goldfish color?

I was fooled a bit when buying this one fish, when the fish arrived it looks not so appealing to me... is there something I could do to brighten it's color or should I just ask for a bit refund? I ...
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Why my aquascape shrimps died

Yesterday on around 5 pm I put my two of 10 g aquascape outdoor, my intention is so I don't have to use LED light during the day. Right at the next morning on one tank, many of my shrimps died, but ...
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60 views

How can I tell if my goldfishes' popeye is due to stunting or an infection?

I have three goldfish in a twenty-gallon tank. I know it's not the best set up and I would like to move them to a bigger tank when I get the opportunity, but they seem happy and healthy enough. I have ...
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1answer
49 views

Will every goldfish never stop growing?

I'm confused whether goldfish will never stop growing or not, how much will its genetics affect its size? I want to buy a high quality goldfish, not a bad one.
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1answer
62 views

Why my goldfish red cap lost its head color?

Is it normal that the color fading away..? The water seems fine. Food : Tetra Goldfish Growth and other pellet. It's been 2 months with me.
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1answer
49 views

What fluids are in effusions caused by anticoagulant (constituent of rodenticide) poisoning?

(moved from medical exchange) ACR rat poisons use anticoagulants to cause internal bleeding and thus death in rodents. If used improperly, poisoned rodents may pass the poison on to predators, ...
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1answer
60 views

Are the mouths of cats more sensitive to temperature than that of dogs?

I have had many cats and dogs. I have noticed that when I can share some food with my furry friends, my dogs will gobble it up without worrying about the temperature, but my cats will sit there and ...
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1answer
50 views

Puppy Pee Schedule: If not relieved post mealtime, will it lead to a UTI?

My partner has cautioned me that if we don't take our 6 month old puppy outside to pee within 30 minutes after mealtime, he's at risk for developing an urinary tract infection! I've searched all ...
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1answer
99 views

Is my cat a calico?

My cat is mainly white with black spots, but he does have a light brown 'goatee' going on, along with light brown spots next to the black spots and a large one at the base of his tail and inside of ...
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1answer
63 views

Can a cat cut its tongue on an open food can's edge?

It would be really convenient and save money, to let my cat "Mucca" clean her wet cat food cans with her tongue - but I'm afraid she might [at least eventually] cut her tongue on the edge of ...
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2answers
86 views

Can a regular German Shepherd give birth to German Shepherd puppies with coat colors identical to hers, but give birth to one single white puppy

Just curious to know (I also need this piece of info for writing my novel). So, can a German Shepherd (classic-looking fur coat) give birth to four identical German Shepherd puppies that look just ...
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1answer
73 views

Are cats used to a food for a lifetime?

As we all know, cats have very sensitive stomachs. That makes me wonder. Once a cat gets used to a specific food, are they used to it for a lifetime? To make an example: I feed my cat Food A for a ...
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1answer
41 views

Do all koi have the potential to grow to 3 feet long?

I have seen many videos with koi that are 3 feet (around 90 cm) long. However, I also know that some koi from desired varieties are really expensive. If I am buying koi from Petco and Petsmart, does ...
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Does my kitten have medium length or long hair? [duplicate]

Our six month old kitten is a Maine Coon mix - the person we got him from said he's ¾ Maine Coon and ¼ Bengal but we're not so sure. We were wondering if you think he has medium or long hair? He's got ...
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4answers
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Does purring tire cats?

Hope it doesn't sound like a silly question. Context: My cat is not the most affectionate cat in the world. But sometimes she comes to search for love and to play. When I pet her, obviously, she ...
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1answer
137 views

Can a cat know you came thanks to his sense of smell?

As I mentioned in other questions in Pets.SE, I have a cat since 2011 who, sadly, can only live outside my dad's house. Since mid-August I had to move out to another quite small apartment, which is ...
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4answers
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Why do groomers tell you not to shear a long-haired dog in warm weather?

Specifically, I have a Great Pyrenees. I've had groomers tell me that a dog's fur keeps them cool in hot weather as well as keeping them warm in cold. This argument holds as long as the environment is ...
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2answers
2k views

Inhaling or ingesting cat's hairs

I discussed with somebody about the fact that I would like to buy a cat. The answer was that it can be dangerous, but in a different way than I expected. Their argument was that inhaling or ingesting ...
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1answer
103 views

Do cats recognize cats from different litters but same parents? [duplicate]

I adopted a kitten who is now 6 months old. His cat parents just had another litter and I want to adopt another kitten to be his buddy. Will he recognize that the kitten is related to him? I’m worried ...
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1answer
78 views

Iris of my cat's left eye is discoloring on the edge

A few weeks back, I noticed my cat's left eye's iris is discoloring from the corner (brownish red, iris is gold color). She is 8 years old, female. She has no other complaint whatsoever. I know I ...
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1answer
74 views

Do rabbits see well at night?

I am curious how good the senses of rabbits are. They are not predators, so I am not sure about seeing in the dark. What could rabbits see in the (nearly) dark? Do they have ability to see in the (...
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1answer
88 views

Why did my Oscar change color?

Both pictures are the same Oscar. I was hoping someone can tell me if it normal for him to change colors like that.
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1answer
218 views

Why are some black dogs called blue?

I've noticed that in some cases when a dog is black, at least to my eyesight, they are described as being blue. Here is, I think, an example of this, in a Doberman: This photo on Wikipedia is ...
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1answer
90 views

Can a pug be trained for extended hiking?

We are thinking of going on a long hike. About 15 km per day for a week. Weather will be mild. We have a five month old healthy pug. At the moment she appears weary after 2 hours walking with us. I ...
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1answer
977 views

My cat was cross-eyed, now she’s not. Why?

I got my cat half a year ago at a rescue centre, she was very cross-eyed, the longer she has been in my home the more her cross-eyed-ness has gone. Is this normal? And what has caused this?
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1answer
104 views

Can dogs shed back to their original coats?

We have a schnoodle and his coat changed from black to silver by his first birthday, just like other pups I’ve read in some previous threads. Now he’s aged to 14 years now and he’s starting to spot ...
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1answer
698 views

Does a pet boa/python measure the owner by lying straight?

I read it somewhere, maybe as a Facebook photo of some Tumblr or yahoo a long time back (hence not a reliable source) that the user found it's pet snake (which was not eating food for quite some time) ...
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1answer
115 views

Are dogs much less sensitive to high noise than humans?

I must admit (a bit shamefully) that I was not aware of the fact that volume is on a logarithmic scale and thus following sentence (source) surprised me: The back seats are closer to 87 dBA, which is ...
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1answer
384 views

Film on surface of female betta tank

I recently took in one of my friend's male Bettas to treat it for ich (Ichthyophthirius infection). When I brought him back I noticed a film on the surface of her other Betta's tank (this one is a ...
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1answer
1k views

Do rabbits feel pain?

An answer at How smart are rabbits? includes the following quote and reference. Rabbits also have no or very underdeveloped pain sensing regions in their brains (source): Even as a predator rends a ...
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2answers
3k views

What is this white layer growing in the snail shell's entrance?

My snails have been making a layer of... something(?) around the entrance to their shells. I don't know what it is. They remain in their shells until I remove the layer, which is really bothering me....
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2answers
191 views

Why do dogs have black eye juice?

I always wondered; why are the bodily fluids, etc. that accumulate (and usually dry out) in the corners of a dogs (and cats too, I think) eyes black?; but in humans, it is not?
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1answer
12k views

What causes rabbits to spontaneously change gender?

Working with rescued rabbits we often have people who purchased two girl (or boy) bunnies from a pet store or breeder, and a few months later they have a bunch of baby bunnies that need new homes. I ...
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1answer
79 views

Idle mackerel tabby terminology question

It is said that "mackerel tabby" cats (tiger tabbies) always have an M on their foreheads, made of two stripes forming a chevron (^) on each side of the centerline. My two, as shown by ...
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1answer
4k views

Why do dogs' and cats' eyes reflect light? Does bright light affect their vision?

At night when the light is pointed towards dogs and cats, their eyes give a gleaming effect (greenish light). It even happens during a flash of a camera. I've seen this on a cat and the dog and ...
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3answers
441 views

How do kittens prevent my cats from going into heat?

I have two indoor cats who're sisters. One of them got pregnant and had kittens, and the sister did not go in heat once during the 3 months we had the kittens. Do kittens prevent a cat from going in ...
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2answers
20k views

Motion-induced dizziness in cats

Humans can become dizzy by spinning around quickly. Small children will occasionally do this on purpose, for the thrill. However, intentional dizziness inducing behavior is (as far as I am aware) ...
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1answer
3k views

Are dogs sensitive to star anise's smell?

I have just read (in Polish) a 1985 crime novel, by Norwegian author Gert Nygårdshaug. It seems, that it wasn't translated to English. Its original title is Honningkrukken. There's a tiny end-story ...
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2answers
352 views

Can dogs see things that humans can't?

The other day I was sitting in my lounge alone and my dog got up and started growling and barking at the air. She wouldn't stop whining and wouldn't take her eyes of this spot for ages. Can dogs see ...
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1answer
132 views

Do house rabbits depend more on sound or vision for warning?

In the related question What is a rabbit's field of vision, range and visual acuity? we learn about a rabbits vision. This question is asking about what is the primary sense a house rabbit uses ...
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0answers
391 views

What is a rabbit's field of vision, range and visual acuity?

I have a pet house rabbit, rabbit eyes are pretty much on the side of their head. They also have great big ears. What can a rabbit really see? How well can they see? Can they see 360 degrees?
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1answer
600 views

What does mg/kg in AAFCO's nutritional guidelines mean?

In AAFCO's nutritional guidelines the minimum quantities for iron(adult minimum), for instance is expressed as 40 mg/kg. Does that mean that a dog should eat at least 40 mg of iron for every 1 ...
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1answer
3k views

On average, when do cats stop producing milk after giving birth?

As mentioned in my other question, How can I get my cat to stop nursing on its mother, I mentioned that I was not sure if the mother cat was producing milk, which could be causing my 9 month old cat ...
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2answers
17k views

Do cats recognize their family? Perhaps by scent?

Is there any scientific or anecdotal evidence that cats recognize other cats who closely share their DNA? As in, new kittens from the same mother and the such? I'm suspecting that there might be such ...
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2answers
785 views

Can cats see equally well in both light and dark?

I know that the cats can see in the dark, but I have been wondering: can cats see as well in the dark as they do in the light? Or do they see better in the light?
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2answers
100k views

What age do cats stop growing on average?

I've heard humans stop growing around age 18-24. What about cats? When do they stop growing in height?
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2answers
129k views

Diurnal, crepuscular, nocturnal, matutinal, vespertine; what do these mean and how do they impact my pet's life?

A recent answer listed all of these and said the group a pet falls in could impact how they behave: diurnal, crepuscular, nocturnal, matutinal, vespertine. What do all of these mean and how do they ...
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1answer
8k views

Can corn snakes see everything?

Can a corn snake see everything? It seems that my corn snake acts like he can actually see me. If I move somewhere in the room he will look right at the direction I am at. I mean snakes like to do ...
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1answer
4k views

How wide can a corn snake open it's mouth?

I know snakes can unhinge their jaws when they eat food that is large (rats, large mice, etc.), but I don't know how much that helps them to open their mouth. How wide can adult corn snakes open their ...