A doctor found Stage-2 breast cancer at the spot where Michelle Pearson's cat Mia was insistently sniffing Kelli Bender is the Pets Editor at PEOPLE. She has been working at PEOPLE since 2013.

It causes symptoms similar to the flu ... But if the cat has an underlying health issue, like cancer or feline leukemia, the immune system may fail to suppress the parasite, resulting in clinical ...