You certainly shouldn't pop them for no good reason. But antibiotics can absolutely be life saving in the event of an infection.
https://www.cdc.gov/drugresistance/food.html
> Food animals should not have any antibiotics in their body when they are slaughtered or processed for food. Antibiotic residues are small amounts of leftover antibiotics or pieces of antibiotics that are not completely absorbed after an animal is given antibiotics. USDA, with FDA and the Environmental Protection Agency (EPA), administers the U.S. National Residue Program (NRP) to prevent residues that pose a potential threat to human health from entering the food supply.
Yes, but there's a quality control aspect there that makes one a touch uncomfortable. My fish getting a little something extra in their amoxicillin is something I stress far less about then if I'm the one taking the pill.
It's probably not something you could ask for too often, but I don't think it'd be that hard to do.
https://www.wbur.org/commonhealth/2019/11/26/veterinary-anti...