Adopted a pit bull/lab mix

I fell in love with a pit bull/ lab mix,at the local animal shelter who they think might also have some Staffie in her, but her ears are very little. She is very docile and loving, about 1 1/2 yrs old. She was brought in by her owner who said he'd bred her, sold the pups and didn't need her anymore. . .she is being spayed before I can bring her home. We already have a shepherd husky mix and a lab terrier mix who are very friendly, and about 3 yrs. old. Plus our 2 cats. The shelter rated her as good with dogs, cats, and people.

What are some suggestions for introducing her to our menangerie?