Previous Owner's Information. 1. 1. Enter buyer's and seller's full contact information.Yes, a Pet Addendum is necessary when a tenant wishes to have a pet in a rental property that doesn't explicitly allow pets in the original lease agreement. Enforcement Officer to the Owner. 12. Revocation or refusal of kennel licenses. Pet Custody Agreements; Your Pet's Best Interests. A foster contract is filled out with specific questions concerning the care the dog will be given during these three weeks. This is really a straight contracts issue moving accordingly. As we have not read the contract, we do not opine on its enforceability.