Grandfather clause, is where something that has set before whether it is animals, building or moving mobile home onto the land. I went to get permits for the mobile home, they said no at first and ask why. They needed proof that a house was on the land before we bought it. So took real estate papers and picture of the the house.Read the contract to see what is written in, as long as it states you may have ferrets (typed or hand written) this can be the grandfather clause.As the others said before, get a lawyer, legal aid. Tenants do have more power over the landlords. I know, I have been apt manger and tenant too. Marie and her 6 most Wonderful Fur Kidlets [Posted in FML issue 4485]