Stable? Do you mean, Kennel?
She probably is. But, that does not mean you should go into this with 2 bitch pups.
A dog with special needs like this will need the same kind of training and socialization that the pup needs. Even if she is good on lead, to get her used to the world outside, you should take her to classes and regular walks. This should be done one on one. 2 puppies at once is more than double the work. Though, it can also be highly rewarding, and if you work outside the home, even if they are crated during that time (should be separated if you cannot supervise) the fact that the other dog is there, will make that easier on them.
Evenso, if you want to do two and you are not afraid of the more than double the work, then ask the breeder if she has a male.
I am not sure what you mean by bloodstock with contract. Are you raising this female puppy to be a breeding bitch then?
It can be done, but you have to walk into it with your eyes open, and if there is a problem you will have to be willing to keep them separated for life. Pet owners may not be set up or ready for this. Breeders pretty much have to be.
Good luck in whatever you decide.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC