Actually not all rats are afraid of cats. I had a lot of pet rats and some cats. While the two cats are mostly afraid and respectful of the rats, about 1/4 of the rats had no problem co-existing with the cats. Like, they saw the cat as a rat and acted like it, not afraid or anything, while another rat peed herself because she was so scared of the cats.
Actually not all rats are afraid of cats. I had a lot of pet rats and some cats. While the two cats are mostly afraid and respectful of the rats, about 1/4 of the rats had no problem co-existing with the cats. Like, they saw the cat as a rat and acted like it, not afraid or anything, while another rat peed herself because she was so scared of the cats.
Maybe that one had gotten the toxoplasmosis