Good Day, I have been watching my cat brady when he goes to his litter box, and the past 2 times that he has went, his stool has been bloody. I did change his cat food over a week ago to Purino One(dry),and feeding him wet every 3 days(started when I changed his food brand) cause of dry skin. I never noticed until now. He acts normal, eats normal, everything is normal in his every day doings. Anyone have any ideal why this is happening?? Thanks for your replies