
Hi Polar, first question should be, have they contacted the breeder to see if a genuine mistake had been made - are they aware of how this pup looks, could the bitch have been accidentally mated by a dog of another (or cross) breed as well as by the supposed sire? I think it essential to get the breeders response first, if they take one look at the pup and agree, they have a lot of options open to them, and they might want to fix this problem - contacting the rest of the puppy buyers, the KC, DNA tests etc (and, of course, refunds to the buryers). It is possible for a bitch to conceived to 2 seperate dogs, and if this is the case the KC reg. for the pups tested to be bred as registered can stand, while the other (s) will have to be de-registered (if that is the term).
Of course, if this is not the case, and the breeder denies all interest/responsibility then blood/DNA tests wil have to be requested by the pups owner, and the KC complaints/small claims court route followed.
bye
Gwen