I have 3 cats, do home PD and haven't had a problem. If she does home haemo you should make sure the dog doesn't go in the room where she does it - that's all. Lots of us have cats and dogs. They're being overcautious.
We have an "inside" dog and my husband's on home hemodialysis. Hop-Sing (my dog, who is 7 years old) doesn't cause any problems for my husband. But, my husband does seem to irritate the dog -- especially when Marvin won't share his snacks with Hop-Sing. Seriously, I've never heard of this before.