Pets do not cause peritonitis. However, their hair, if allowed to accumulate, can cause un-cleanliness, so vacuum, clean up more often and purchase a HEPA air filter. When doing your exchanges, it is a good idea not to have your pets in the same room. Ask your medical professionals to seek out and share success stories with you! It is a scientifically proven fact that when ill people have something to love, they feel better and healthier. There are lots of people currently doing PD that have pets and have not experienced any infections.