My 9 months old boy named Brain is too friendly.
He shakes his tale to all strangers. Never back at stranger(s) for once.
I just acquired a 6wks old girl named Tasha.
Naturally, Brain would want to dominate and I dont want Tasha to learn too friendly act from Brain.

Please advice me.

before getting a pup you should ask about the temperament from the breeder so you k now what to expect from the pup, he just might have gotten that from his parent(s), another reason might also be the way you raised him, environmental factors e.t.c. a little training from a good trainer would help . His friendly nature is no reason why he should be seperated from your new pup.

Thanks bro. My vet doctor just requested to keep Brain among his massive caucasians.
I hope it will work?

treeofhelp:
Thanks bro. My vet doctor just requested to keep Brain among his massive caucasians.
I hope it will work?

I thought you had issues with your brains temperament...how is he staying with your vets "massive" Caucasians going to help?. Or is there another reason you're taking him to your vet apart from the fact that his dogs are massive?