Pretty nasty stuff for sure, but better out than in in this case. I don't believe the temporary bulging is an issue, that was probably just him straining a little making sure everything was pushed out. But you know that I believe he's got another issue (or two) in his body, and a bloody sperm plug is not common. I'm glad he's on Baytril, but I sure know that Baytril is not the wonder antibiotic that it used to be either; I get back so many culture and sensitivities where Baytril doesn't work that it's never my first "reach for" drug anymore.
One thing I do want to point out is that I've certainly seen Baytril cause anorexia, probably due to nausea from the higher doses that we typically use in reptiles. BTW, you had mentioned his volume dose but not the concentration, so I can't double check the dosage. Anyway, I just wanted to mention it because I've certainly had my own chams not eat well or even at all when going through a Baytril regimen.
Wish I lived in Las Cruces, buddy. It sucks watching a case like this from a distance, but I just don't know how valuable any of my advice is. What I would give for an MRI, rads, bloodwork, and an ICU for him.
:-(
dr. o-