Best way to help your dog with..?

I have a yorkie too but they just have to get used to them. Dont force him to go there if it doesent want to. I also have a huskey and it had to get used to my big dog. try taking him on normal walks like to a trail or a park where other dogs are but there are still the same amount of people. When it doesnt nip anymore, give hime rewards like treats untill it is normal.