Bear - 2016-03-20 12:56 PM I can't speak to vets, because I've only had joints injected by one vet, but when it comes to sloppy aseptic technique, horse owners themselves take the cake. I have seen people give shots IM and IV without any prep whatsoever. Then, they blame the drug for causing the abscess. Many re-use needles, not just in the same horse, but others as well. Some save old dirty needles and use them over, rather than pay 10 cents for a new, sterile needle. Watching some of these people is a real time example of how people did things back in the Middle Ages.