first...welcome to yorkietalk!!! and I love her name!!! LOL...that's my Moms name!! wait till I tell her someone named their pup Shirley!! LOL...
on a serious note now....My parents had a mini schnauzer (RIP Heidi
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she had these little white bumps on her back too...their vet told them that they were like little black heads...they never bothered her...If you are really concerned about them being something bad why don't you have the vet remove one bump and have a biopsy done on it...this way you will be sure of what it is....and isn't..
I hope you find out it's nothing