YOU were right; he was wrong. You have your server as a witness.

"I took in a dog from a rescue..." Meaning she forfeited the dog. It is yours - treat it and her accordingly.

This is: 1. A landlord/tenant matter, not animal law, and; 2. None of your concern. Let your cousin deal with it.

Retain counsel versed in administrative law to deal with this citation.

There is absolutely no obligation to " answer the door when the doorbell is rung." This LL clearly has issues.

This is a landlord/tenant issue - moving accordingly, so you get better answers.

Talk to animal control and an attorney regarding noise ordinances and filing a nuisance complaint.

I find it hard to believe there are no leash laws where you are. Document their transgressions and damage, and report them to Animal Control,...

Take your documents to an attorney for review. Use the Avvo search tool and/or your county bar association to find one near you.

"My dog just bite the mailman?" Presumably, yes - but that's not a legal question. Notify your homeowner's carrier of this imminent claim.