yeah housing associations do only allow 1 dog/cat on the premises and it is in all contracts that you cannot run a business from your home. whether or not you see what you are doing is a hobby or business!
if you have 3 or more breeding bitches then you must have a license for the dogs, especially if you sell the puppies whether it is 1, 2 , 3 or 4 puppies that you sell. if you didnt sell the pups then you wouldnt require a breeding license!
breeding licenses, follow the link:
License - Breeding of Dogs | ClacksWeb
breeding is only classed as a hobby, if you give all pups away and not sell any of them. and if you have more than 1 breeding bitch then it is hardly a hobby now is it?