Help Our Family dog

Kovu has been a member of our family for 3 years now. Today a German Shepard that got lose from its chain and came and attacked all the little dogs. Unfortunately Kovu was the only dog who got badly hurt. He got his head bit so hard his eyeball popped out of its socket. If he gets medical attention soon he will be able to keep his eye and possibly all eye sight from that eye. I rushed him to the vet and they gave him pain medication and a cone then sent me home because they needed $58 initially and 20% of the $1,800 surgery. Please help our family get Kovu the surgery he needs to keep his eye. Our hearts are broken. We need to come up with $500 before we can do payments and to get the surgery. This is urgent to us and everything is greatly appreciated. All prayers and help is greatly appreciated. Thank you!