Urgent Care Needed for Leo's Vet Treatment

My friend's dog, Leo, was attacked this morning by a big dog. We were able to pull them apart, but not before he received damage and bad tear/bite marks. The vet said they need to drain and stitch him, do X-rays, and prescribe meds, which at the moment we have nothing for, or we would spend our last dime helping him. The owner of the other dog has yet to be found, or we'd ask for help there. Poor baby needs help fast. If anyone can help at all, anything matters and helps. Please and thank you.