This is just dreadful.
Do you have this woman's contact details?
These are probably the last things on your mind at the moment while you are looking after your poor puppy, but firstly, the dog who attacked is clearly both dangerous and out of control. Can it be reported to the police?
Secondly, surely the owner is responsible for your vet bills?
I do hope your puppy recovers quickly and so do you and your husband and children. It must have been really traumatic for all of you.
Some people just shouldn't have dogs if they don't know how to train them.