Dear {Recipient}, I would like to apologize on behalf of my {Type of Animal}, {Name of Pet}. As I'm sure you understand, my {animal}did not maliciously attempt to {incident}. As the owner, I take full responsibility for the behavior of my pet. I have taken steps to ensure that {incident} will never happen again. As no one was injured and all the damages have been resolved, I hope we can put this incident behind us. Again, please accept my most sincere apologies for my pet's behavior. Yours truly, {Sender}