Present the erstwhile owner with a bill for the dog's care.

You should be asking animal control about local leash laws, and reporting any violations to it.

This is really a contracts issue - moving accordingly. You paid for, and took possession of, a dog lacking the papers needed for your purpose....

If she did not give you a receipt and the account number for your security deposit, she violated tenant law. You may wish to call the AG's tenant...

Moving to domestic violence, which is far more appropriate. You may also consider contacting BATFE. It loves to find felons making guns.

Contact your AG's elder abuse division to see if there is something it can assist you with. Your county bar association may also have a pro bono...

You need to retain counsel. Use the Avvo search term and/or your county bar association to find one.

This is really a contract issue. How late were you in paying and how late were you retrieving your dog?

Use the the Avvo search tool and/or your county bar association for referrals, and discuss fee schedules.

This clearly belongs in divorce and separation - moving accordingly. Your attorney should be handling this.