Dear Maia...please don't blame yourself and don't apologize for long post.
Have you seen mine?!!
Really, I think Ulysses just really missed y'all, got fleas which he's not used to,
got hot spots & yeast...that's a whole lot to happen in a short amount of time.
I think it was just all to much for him, he was suffering and he reacted and bit
the Vet. I don't think it is hormonal and I personally DO NOT neuter unless there
is a need too & have always had healthy males w/out male problems i. e. roaming,
marking, aggressiveness, bad behavior, etc. And when I do neuter it's when they
have matured physically which by now, he has. It might take a while for him to feel
safe again and stop being so reactive. There's a herbal supplement called Remedy
Rescue that helps calm them instead of hormonal injections~less expensive I'm sure!
Let us know how it goes...will be praying for all you, GOD bless!