My 12 year old cat has been losing a lot of weight all of a sudden. She behaves fine but she is always hungry. As soon as she finishes eating, however, she goes straight to her litter box and has been having diarrhoea every time.
I've been giving her canned food because she acts like it is hard for her to eat hard food which I did because of her age. I thought that maybe she had worms although I've never seen any in her stool. I went ahead and gave her the exact amount it said to give her then to repeat dosage again in 2 days. This has not helped her.
I changed her food to grain-free food (both hard and soft) which has helped her diarrhoea to thicken up just a bit but she is still getting extremely thin. You can feel all her bones everywhere on her body. Her hair has also been getting very knotted. She is a long hair cat and I brush her regularly but lately it's been badly knotted to the skin
She still eats like crazy and drinks water regularly but today she has just been lagging. I don't have the money to take her to the vet but I can't stand the thought of not trying to help her either.
Does anyone have any idea what could be the problem?