How to other owners manage to help an older retain her top dog statice when they introduce another dog?
I've had to keep my son;s 4 year old collie while he finds new digs.Its been a week now and the younger one is winning the squabbles they have.Our old dog has very few teeth left and even the sticks she gets first she cant keep as the younger one snatches them out her mouth.

Help dont want my own dogs remaining years to be miserable nor do I want to say I cant look after the younger one.

Any advice would be appreciated.