Bag Balm and neosporin will work (pine tar will, 99% of the time, keep them from repeating), but to prevent this happening often get something that tastes bad - pine tar/masks injury (like blu-kote).
We keep a 15w incandescent in a securely fastened shop lamp fixture aimed up at the inside of...
Yes, but it is probably better to use plain neosporin along with something nasty tasting. It is also useful to provide alternative targets of their attentions, i.e., extra protein and fruit. High quality bird feed, hang up a peach in the coop, flock block/suet cake (if nothing else).
Since...