When evaluating an injury, for my dogs, cat, spouse, children and self, I evaluate the injury and know what I can treat without running to a doctor. There was no blood gushing from the wound, it was more cosmetic, very much like when a chick tears open its head. A 1/2 inch cut that a butterfly suture will close does not require a visit to the vet for a dog or a chicken. Instead of risking infection from shaving the area to apply the sticky bandage, I opted for glue-ing it on. (All the times I got crazy glue on my fingers, it never caused me any harm) Years later, doctors began using a product similar to crazy glue in surgeries. Then they marketed a product OTC for everyday injuries and use.
I guess I am fortunate to have vets and pediatricians that encouraged me and my husband to trust our judgment. Had an infection set in, my vet is so trusting that he would call in a prescription to my pharmacy without seeing the dog. He knows I would come in to the office in a heart beat if I needed more help. I don't treat everything, I know my limits and have taken my kids and pets to the emergency room more times than I would like to admit.
The point I am trying to make, there is a chick that needs immediate treatment. The owner is contemplating culling, but before she throws in the towel, she has an opportunity to learn to treat the chick without incurring an $80 vet bill for a $3 chick. (Maybe the chick is worth more). My first repair to the head of a chick wasn't perfect, but my second attempt was undetectable.
So many posts talk about using antibiotics and seeing the vet. I have a different approach to my flock, they are not pets, although many are dear to my heart, I try to keep my flock profitable while providing food for our family. If I wanted a $5 dozen of eggs, I can get them at the store and use my yard and time for something else.
No offense taken by your question. We all have different approaches, means and a great forum to discuss these ideas.