NLR so posting here. My friend needs help with her dog!

They were at the dog park today and afterwards their dog started limping. They looked at her paws and noticed that both front pads have bits ripped off them so she has big round raw circles and she's limping and licking at them.
Anyone have any suggestions to help them? They rang the vet and all the vet said was to take her in for observation so I though I'd ask you lovely folk first.

thanks so much!
Cheers Sarah