I think it is relevant to mention that the "employee?" was a young boy and that he was not in the room at the time of the attack.
It is also important to mention that the attack was led by 3 pitbulls, a breed known for dog on dog aggression and that a daycare has a responsibility to its clients and should not take any breeds that are known for this type of aggression.
Dog on dog aggression is very different than aggression toward humans, so no matter how socialized the pet, the characteristics of its breed need to be considered by this type of facility.
Lastly, I am sure the dog's owner would appreciate any donations toward his care.