Jojo is very cute, and I'm glad that he is getting the care he needs. I hope he pulls through this latest health hurdle quickly. I wanted to say that Jojo appears to be a Presa Canario. They are a type of mastiff that comes in various shades of fawn and brindle. The breed tends toward same-sex dog aggression most commonly, but they can be completely DA, and now and then you get an individual who is not DA at all. They are very sweet with the people they love, but don't be surprised if a little guarding instinct comes out of him as he gets better (although it may not, with all the BYBs breeding these mastiff types lately I am seeing more without the proper temperament). He does look like a sweet guy though. We have a presa canario at our rescue (http://www.foha.org
) who really doesn't have much of the proper breed temperament (although he is a little DA), but he is very sweet and well-behaved.
ETA: Come to think of it, with that "blue fawn" coloration (the presa breed doesn't come in "blue" fawn, just fawn), he could be a Cane Corso/Presa Mix, or APBT/presa mix. People are mixing these breeds up a lot these days. :/