i am getting a Staffordshire bull terrier puppy in few days. It will be a male. how can i introduce the puppy to my other dog? ( she is 3 years old and a female Crossbreed) My dog is very jealous of me giving attention to someone else. How can i introduce them ? so the puppy won't be scared and my dog will feel comftorbale? and should i take my dog with me when we will go to choose the puppy?