I called the Sheriff's office and was told that the HOA CANNOT hold him or keep me from accessing him or keep me from removing him. I can't say anymore right now but I'll update when it's resolved. Such craziness!
And yes, HOAs do have WAY too much power in AZ!! The stories of mismanagement, money co-mingling, missing funds, etc. that I've heard from other members of this community are ASTOUNDING.
Thankfully a neighbor is looking out for him and making sure he's fed and watered and that he gets his supplements. The barn throws hay, cleans the stall and they're continuing that, though at one point my landlord accused me of having stopped feeding him!!! Such BS!