Hi all, I have an interesting question, I'm a registered breeder of dachshunds and golden retrievers, have 4 dogs at home and consider myself fairly clued up on dog behaviour, but this one has me a little stumped. I recently bred a second (and last litter of GR's one of which I kept, 4 of the other pups went to fantastic local homes with friends of mine. I had expected to be able to socialise with them regularly. But recently my pup Sadie, who is now 12 weeks has been displaying aggression towards her littermates in a very non playful way. She is perfectly fine meeting other dogs calm and even submissive but when her siblings bound up to her she is immediately tense and will go for the attack, pinning them down and having to be dragged off. All is calm at home, her Mum is very placid and gentle with her and she plays very gently with my 2 dachshunds, there seems to be no dominance issue at all. I dont know whether to continue letting her meet her siblings in a controlled environment, or just leave her for a month or 2. Any thoughts?