I have been told that this can kill a horse, but this would be almost instantanious. The horse would drop right after the shoot is injected. I don't know if this is true or not. Scared me enough to make sure I don't do it.
I was nervous after I did it because when I pulled the needle out it bled a little bit.. I did pull back before I injected and no blood came out and it was tough to pull back a little.. but she has never bled after a shot before and it scared me a bit.. i watched her for about a half hour then fed her and she didn't act as tho anything was wrong, but someone said it takes an hour or more before anything happens.. I just wanted to know if it could kill her if by any chance it did happen, or if not death, how bad?
It wasn't pouring out, and there wasn't any blood on the needle or in the suringe.. but a couple drops fell down her fur afterwards. It quickly quit bleeding, but it's never happened before and just freaked me out.
If you pull back the syringe without blood you shouldnt have a problem. Its actually easier to hit muscle then the vein. Main one runs at the bottom of the neck. You should always get them somewere in the exact middle of the neck. (Middle from top to bottom and left to right.) Some horses bleed a little after an IM shot. Sort of like how people do at the doctor, after getting an inoculation.
You probably shouldnt be giving shots if you dont know if you hit a vein or not...
Yes, intravenous injection of vaccines can lead to death.
What happened with your horse is likely that you went through a vein when inserting the needle, but you were not IN the vein when you injected if you pulled pack (aspirated) and didn't get blood. There are lots of little vessels all through the body and it's not uncommon to get a bit of bleeding after giving an IM or SQ injection because you can still disrupt capillaries with the needle without being in one.