Lets see a closeup of his bill and feet. Continue dosage as if you did not over dose the first time.
Damage does not look consistent with a fair fight in the open. Damage to bill and feet would be expecting if foe was engaged through a fence. If battle one sided with both in the same enclosure or outside, then bird in hand had a prior issue that put him at a major disadvantage where he may have actually fought very little.
Keep him in a cool (50 to 70 F) dry place with water nearby. I would resort to treats to get appetite back. If he has been provide adequate grit then he will be able to handle grains. A small amount of chick grower added to what you provide should help.
I normally do not use antibiotics for such yet survival very high.
Damage does not look consistent with a fair fight in the open. Damage to bill and feet would be expecting if foe was engaged through a fence. If battle one sided with both in the same enclosure or outside, then bird in hand had a prior issue that put him at a major disadvantage where he may have actually fought very little.
Keep him in a cool (50 to 70 F) dry place with water nearby. I would resort to treats to get appetite back. If he has been provide adequate grit then he will be able to handle grains. A small amount of chick grower added to what you provide should help.
I normally do not use antibiotics for such yet survival very high.