How can I stop cat diareha he is a very big cat I am disabled he gets it on him and I have to literally wrestle him on the floor to clean him and in hour back again help

Are you giving him milk? That will cause diarrhea. Does he have other symptoms of something? Did you change his food? How old is he?

No he only eats purina cat food and he won't eat anything else. He won't eat off the table
And if you try to give him another type of Purina he won't even eat that.