You and your exspouse cannot both always have the dog. Rather, you must negotiate a visitation schedule.If you have a pet that you can't bear to part with, drafting a pre or postnuptial agreement is a good idea. A pet that was bought during marriage is considered marital property, and both spouses have equal rights to that pet. No Pennsylvania statute allows couples to go to the courts to create custody agreements for their dogs when the couple separates. You sold your dog with no contract, so you have no right to "repossess" the dog. Big decisions like getting an additional pet need to be an agreement. It takes two yeses to be yes, but only one no to be no. What does a pet agreement include? In order to avoid pet ownership disputes, some couples are making agreements regarding the pets before getting married with "petnups.