>>530113025
>surely we're far enough into the future for horse prosthetics or just shoving a bunch of metal into them to keep them alive instead of putting them down after an injury right?
no
horse anatomy isnt like human or dog or other mammal anatomy, where breaking a leg is inconvenient but we can survive being bedridden for a while or just limp.

horses with a broken leg cant even breathe properly, their veins are also made in a way that constricts blood flow to prevent it rushing back up their veins too fast which you'll note is considered a serious medical condition in other mammals and which fucks them over if their leg doesn't work, their bones can bend and get permanently fucked rather than having clean breaks and easy healing, their stomach lining is very thin and prone to issues, and they make for absolutely terrible patients and will frequently injure and re-injure themselves in recovery instead of quietly sitting with a cone of shame and a cast like a dog
a dog can survive even being 3-legged just fine, you cant just easily cut off a horse's leg and give them a prosthetic, their anatomy just doesnt work nice that way