Notify the landlord in writing about the intention to have a service animal. Three templates for service dog letters from healthcare professionals, covering the types of letters service dog users may legally need.If a tenant wishes to have a pet in a rental property, they should request and sign a Pet Addendum with the landlord before bringing the pet onto the premises. Fill out the Assistance Animal Agreement Form and submit proof of up-to-date vaccinations and register with Dekalb County Animal Services. Happy Trails Pet Center agrees to be completely transparent regarding dog(s), behavior, observations, suspicion of sickness or dog(s) behaving out of character.