[InCorgiLove]

I have 1.5 yr old male Pembroke Corgi and have just introduced an 8 wk female Pembroke Corgi into the household. They are both from the same breeder with the same mothers, different fathers. The oldest, Cosmo, is aggressive, intelligent, and affectionate. He is used to being the center of attention and has typically ignored other dogs (not in our house but on walks) in the past. However, when he met Stella today he seemed quite alert and even scared. He sniffed her until she made the mistake of nearing his water bowl which set off some jumping and growling. I removed the puppy and we tried to introduce them again later. My mom and I frequently petted Cosmo as he sniffed Stella, saying "good dog" in an effort to soothe and reward him. He did nip at her once but has since stopped. He literally hounds Stella...following her around, having to be ahead of her most of the time, sniffing her constantly while she wants to be on her own and relax. She even barked at his a few times which got him off her back for a few minutes.

Is this normal? I really want these dogs to get along and will do what it takes to make them happy. Should I keep letting them get acquanited over the next few weeks? They are always supervised and fed at different times and sleep in seperate areas. Also, I tried keeping Cosmo on a leash but this only made him frantic and more upset. Any suggestions would be great...thank you!