I have an older dog who recently received a small bite wound. This happened a few days ago and it seemed fine until this morning. He is an outside dog. The wound was covered with small white worms apparently maggots and I mean covered. The area is also now swollen. I took a hose and power washed the wound (near the ear) and it's now maggot free (I hope) but I am wondering what I can spray or put on the wound to kill any existing maggots that may exist. I am keeping him inside now. He is eating okay but is very very weak. He is 13 plus years old and have been thinking of puttin him down but hate that. Does anyone have any suggestions on care for the wound and to killthe bugs? No money for a vet... HELP