I added this info just in case you have another attack...... But yes IMO....He needs help.
Chicken wound care
This is from Threehorses--long, but really good and complete.
WOUND CARE FOR POULTRY by Nathalie Ross
(updated August 19, 2009)
Unfortunately, poultry and waterfowl fall prey to predators often as they are a vulnerable species. Its not always possible for us to take our birds to a vet; sometimes we are forced to deal with the injuries...