We have bought home a new mini Dachshund puppy today. Our 2 1/2 year old mini dachshund has taken an instant dislike to her, he is extremely aggressive and i am afraid he will kill her as she is only 6 weeks old and still a little wobbley on her feet. Naturally the little pup is very distressed by it all. Our 2 1/2 year old has never been good with other dogs but we (foolishly!) thought he would be ok with a puppy. Should we admit defeat and send her back to the breeders, or has anyone else ever been in the same situation and can offer advice?