My cat's poop and pee's smell is killing me. It's been over a year since she came to me and I've always cleaned her tray once a week and the smell wasn't bad. But lately I've had to clean her tray three times a week because of the smell. Her poop smells so strong it makes me gag even through her litter box (she has one of those which are covered from all Sides with a flap door thing).
Her pee smells different, I don't know how to explain it, but it's entirely a new smell and also very strong. She's around three years old, female, and hasn't been spayed or neutered (will neuter her very soon). Since she's under weight (around 3.6-4 kgs), I've changed her diet from mostly biscuits (Mera cat food and Brit Care) and sometimes Can food (Brit Care) to mostly canned food (Whiskas) and biscuits (Mera Cat Food). I changed her diet about a month ago but the smelly problem has only started last week. I'm a student and vets around here are very expensive. Can anybody tell me if it's her diet or some serious problem? Thanks in advance❤.