I'm so sorry to hear about Bella, how devestating!
I have heard of other "accidents" through the hands of the "corporate" grooming facilities, ie. toy breeds not being watched and jumping off the grooming table and hanging themselves. I would certainly push the issue with PetSmart, go to corporate if you have to. There is absolutely NO reason ANY animal should be in danger while being groomed by a 'professional'. I'm not saying to go after the husky's owner, but if you have her information, you both may want to gang up on the store. They should have responsibility for all animals in their care, taking consideration with special instructions, etc. Unfortunately, the husky owner should be worried . . . the dog did fatally injur your baby.