Here’s my thought process on this:
The goal of my first aid kit is to stabilize a situation until I can get home and address it properly. I don’t want to have to refill it with “fresh” stuff every trip I make or waste tons of product or meds every time I leave the property. I want things with a shelf life.
So I keep basics to address a major wound that needs to be cleaned up and covered- vet wrap, gauze, cotton, also some Vetricyn spray and neosporin. I also keep a tube of dorm gel on hand in case of a panicked horse situation (it’s probably way outdated at this point). Sometimes I bring banamine paste if it’s a long outing.
So it looks like I’m well under 10 items. I have a thermometer that lives in my trailer if that counts as part of the kit.