Happy Ending!
Thank you for taking such good care of him and he's now able to fly with the others.
I'm sure you'll miss him just a little, but it's great he healed and went on his merry way.
I'm glad to hear he's doing so well!
Hard to know about the missing feathers. They will probably grow back in fairly quickly.
Wild birds can adapt to changes in weather, so I'm not really sure when it's best to release him, that would be your call. Warm weather may be best since he's been...
Vetericyn will be just fine!
Giving a bit of heat is a good idea. I'd follow the suggestions from @CloneFly
The one I found, I kept her in my shed in a box (all I had for a few days!). Lined it with a puppy pad and a few shavings. I wrapped a spare heating pad in an old towel and placed it...
Poor Guy!
Does the bird have a band? If so, read this, it will hopefully help you track down the owner (this is how I tracked the one I found).
Any bird rescues in your area? If so, give them a call and see if they can help you with him.
I'm still absolutely learning about Pigeons, so...