Having a dog for many years does not, unfortunately, give you any continuing rights to keep the dog.If you have a written lease for a definite term (for example, a one-year lease), then during the lease's term, the property manager cannot make you get rid of the dog unless there is something in the lease itself giving the manager the right to do this--for example, some paragraph saying that the manager may put out rules for residents, the definition of which would include "no dogs."When the lease is up, however, they could refuse to renew it unless you agreed to give up your dog.If you are on either an oral lease or a written month-to-month lease, then the manager or landlord could give you 30 days notice that they are changing the lease terms to bar your dog; if you did not comply at that time, they could most likely evict you.