What a terrible way to end a play session. I'm glad you made it to the vet. The wound looks bad but it will heal as long as you keep it clean and make sure he doesn't find a way to pick at it or scratch at it. I see the cone already - poor baby. Mainly be sure to follow all the vet recommendations and meds on schedule to avoid any worsening. I'm sorry your baby got bit - this is why I don't go to dog parks. In my case I'm afraid my dog would attack another if it got too close to me though. Good luck on a speedy recovery.
Snake Vom Eselspfad RN CGC (AKA Raina) 3/5/08
Pyrate CGC 4/1/03-5/16/12 RIP
Too many to list waiting at the bridge but remembering them all