Be prepared ahead to see what problems your dog could have. Rottweiler actually carry quite a few diseases such as JLPP (will die not cure), DM, HFH, XLMTM, and NAD. Even though we do the parents of your puppies that does not mean another recessive gene cannot pop up affecting your puppy. Please check your dog anyway and if there is a disease we as ethical breeds can keep learning what can be carried in traits.
