Gosh, so sorry you are going through this.

Yes, by all means go to another vet and get them checked out well. Then go back into the vet that kept them and demand an explanation of the condition of your girls.
I definately would not give them anymore money..in fact they should be refunding some to you for how your girls were treated!! They would not want to see my hubby come into their office if our dogs looked and acted like that.