While it sucks, the first thing is that you don't want an attorney that you don't have a decent relationship with as it sounds like you have a...

You would need to have the food evaluated professionally and the dogs examined by a veterinarian indicating the food us the likely cause.

Your honeowners insurance can make you get rid of your dog and/or cancel your insurance, so be aware of that.

You also could put out a humane trap on your property and call animal if he gets caught in it.

Important issues will be whether he is violating the noise ordinances and you documenting all the noise violations. Getting an attorney is likely...

Get an attorney and this likely will be handled quickly and will be taken more seriously. File a police report and animal control report.

Yes and you should file right away.

Bringing animal control, or an officer, is best. Be polite. Follow up with a firm but polite demand that the contract be followed.

File a police report immediately but likely you will need to sue in civil court. Time is of the essence.

The veterinary reports will be important abd a current diagnosis for the bleeding. This looks like a good case for reimbursement.