Make sure to wrap his foot to avoid additional infection and dirt build up. I would clean the wound every day. Another thing that might help is to take him away from flock and house him in a dark area ( to make him sleep more) and a small area to avoid over usage of the foot.
Usually you can go to a farm supply store and buy a spray that is purple calld (Wounded Knee I believe). I use this on my horse, dog, chickens, and even my kids when I can't find the first aid kit.. lol.. It works though and they love having Purple sprayed on them. Horse wrap stays well.
You might want to give him some electrolytes to help him gain energy or you can add a teaspoon of honey to the water.