I have a female spayed cat in my flat for the last eight months. She used to be stray, I took her in when she was about six months old. So she's about 1,5 years old.
This past month I have noticed that her urine smells very strongly of ammonia - a much, much stronger smell than it used to be. I have NOT changed the type or brand of her litter (I use Ever Clean Multi Crystal), I have NOT changed her eating habits.
I have noticed that lately she likes to drink more water than she used to, but I consider that normal, since it's been getting very hot around here. I also take care to always have water out for her.
What could be causing this smell?
Also, today she has -for the very first time ever- defecated and urinated outside her litter box (in another corner of the bathroom, where her box is). I know this may be due to the fact that her litter box smells much stronger than it used to now, just mentioning it in case there's another connection. Any feedback on this also appreciated.