With all respect, Cassie might be a good egg out of a litter of ten, so The other siblings might carry traits not so desirable. A pedigree does not mean its a good dog to breed. I know a breeder that has grand champion purple ribbon UkC show dogs. They are good in the ring but you walk up behind them and they spook, I see fear biters all over her dogs and she sells them for 1500 and up. This is just an example of champion bloodlines with noticable flaws , but are continually bred for the breeders purpose of having the most dogs win in the dog show. There are so many sources available for research on Pedigree and Breeding, Look to those sources for your information, as the previous poster suggested , contact your breeder hopefully they can help. God Bless you.