I took my almost 3 yr old Oliver to the vet 2 weeks ago. He had bloody stool and the fecal test came back negative for colitis and parasites. I noticed he was drinking and eating more. He was put on metronidazole for a bacterial infection. I gave it to him for 10 days. His poop looked normal again, but he was straining a lot to pee and poop. When I checked on him today his poop was bloody again and smells terrible. His penis is completely out when he pees, which is not normal for him. His breathing has also been heavier which is not normal for him. If anyone has had something similar happen or has any insight to what's wrong please share.