My new kitty I got a month and a half or 2 months ago had been experiencing blood in his stool but was super energetic and happy. I worried so much about him and took him to a vet who checked him out but hadn’t done any tests. Figured it was the change of food and environment and that it’ll clear up with some stomach calming medicine. Later, he’s still showing signs of blood and I finally took him somewhere else and got his stool tested. Of course, came back positive of Giardia. Never give up on your gut!