[FlyingNimbus]

Hey guys, I got a question. We have a dog and she's calm and friendly, although a "yappy" dog whenever she sees new people or animals. She's never once bit anyone, she's just insanely yappy for the first day the person is over or anytime someone leaves and comes back.

She's a cockapoo(a mutt) that was given to my mother 6 years ago.

My questions are, how do you introduce a puppy to an adult? Would it be a good idea for the first few days, to the first few weeks to keep them in separate sleeping rooms but each day introducing them (our dog in her leash and being held), with some security like a gate to keep them separate but enough to get them used to each others scent? Adding feeding stations close to the gates but a bit of distance to keep them calm.

Our dog has never really been aggressive, and there was a time where our neighbors dog actually dug into our yard(their dog being a pitbull) and attacked her, but she never bit back she just yelped, and still she's seen other dogs and nothing other than just barking/yapping.

Her personality is rather timid, submissive, friendly and sometimes nervous against strangers at the door but mostly calm and collected, and only ever hyper when we're eating (we never trained her not to do that and it didnt bother us).

Anything I should be concerned, anyway to still have another dog and be sure the two could eventually get along?

She's been in places with other dogs, like the vet, petstores, and there's been plenty of smaller dogs as well bigger dogs and she never really does anything other than yap and sniff them.

The house is pretty big enough to keep them separated and have their own owners by their sides for most of the times.

Our sasha is crate trained, house broken(she never does it inside), she knows the commands off, sit, stay, back, and a few others.