Join Date: Sep 2009
Location: Taranaki New Zealand.
I agree with Nrhareiner, I only worm my horse every six months and always mix up the type of wormer. I don't know if you all have particularly virulent types of worms where you are but here they are not a big deal and certainly do not need treating every eight weeks!
It must be the way you are approaching with a syringe it sounds like you need to get better with it. I have not ever had a horse that I couldn't treat with a syringe. The trick is to make it seamless. Change nothing about the way you approach your horse, walk up to it as you normally would, as you catch the horse by the halter in the normal way, slide the syringe that is being held in the other hand up to the corner of the horses mouth, the horse doesn't even have to see it. Slide the tip of the syringe into the very corner and insert as much as you can until the horse opens it mouth then slide in deep and squeeze. Whip that syringe out of the horses mouth and then carry on as if nothing has happened. All of this takes about 10 secs.
Maybe because I don't think worming a horse is a big deal my horses never treat as such either. Also I have worked on farms for years and have drenched god knows how many head of stock. Now, drenching a half feral bull calf is a drenching drama! A horse, not so much.
I think how you approach your horse makes all the difference. I haven't even taught a horse to drench as such. Nothing beyond halter training and handling the mouth in the normal course of bridle training and general desensitizing, I have always just jammed it in their gob and expected them to take their meds like a good horse - and they always do.