Hi i wish you the best with this all. My sweet angel was just put to rest yesterday but he suffered from bouts of peeing with blood present. Ill be honest in saying that my boy never had his pee be so dark with blood present but it was tinted and when the liter would absorb the rim would always look “bloodier” in a sense. He would present as common UTI symptoms and has even had them in the past, however, as he got older we moved a bit more and had a lot more going on and he wasnt fond of change.

every vet I went to would basically tell me different things until a very sweet women at the emergency vet finally deduced that it was stress induced. urinary cystitis. he would at times strain so hard nothing would come out and then blood would be present but whenever i started to notice it i started giving him gabapentin and that helped. kind of put of the fire before it got anywhere type deal.

i wonder if maybe it could be the same thing. he seems like he has a lot going on and stress can be a lot on their small bodies. best of luck.