You can report this to the police and bring a personal injury/assault lawsuit. Consult with experienced personal injury attorneys in your state.

Yes you can sue but your recovery would be limited to cost of care for your animal and a refund.

This kind of injury can happen with or without negligence. An experience attorney would need to review and confer with a health care provider.

Notarization is not required to be valid.

Yes, but it depends on the particular facts. Consult with an experienced attorney in your state.

In some states there is a lawsuit for intentional alienation of affections. Consult with an experienced attorney in your state.

Yes, you can sue for breach of contract.

It is not; the court has wide discretion in the conduct of trials and hearings.

It is too risky as if you could not do it it can cause may problems.

The judge has wide discretion in how exhibits are handled.