- Ants got into my cats dry food bowl and my cats got ant bites inside their mouth. One of my cats developed a fever and ulcers on his tongue. The pain from the ulcers makes him unable to eat. He has now been at the vet clinic for 4 days and still has a fever & not eating enough to come home. They have given him injections of antibiotics, and meds for pain & inflamation. The vet has explored other possibilities for his symptoms and everything is normal. Two of my other cats were also bitten but I was able to bring them home after a 1 day stay at the vet, they are doing fine. Has anyone else ever experienced anything like this? I am so worried about him.