Since when? I just had a long talk with my vet about worming and the new combo care. Ivermectin is still the primary wormer in a rotation program
We have had worm resistance with ivermectin for the past several years in this are. The vets seem to think it was due to the fact when ivermectic first came out, it was advertised as the only wormer you will ever need from here on...
After many more cases of worm induced colic cropping up at farms where(very litttle colic cases had been seen in the past)) the horse were cared for, wormed routinely and maunure picked up in the fields, they did a little research and found that the rounds, were not being killed by the ivermect. This was (they think) due to the farms on the where rotation was stopped and mostly ivermect was being used.
Now that Quest io out, the horses are now showing less sings of the problem as long as they are not depending on ivermect. as in the past.
Most in this area still use ivermct,. but ony twice a year. In the spring for the no see ums, and to kill off bag worms in nursing mares, and in the late fall, after we have had at least two hard frosts, to kill off the bots.
Other then that, it is back to rotating the different class of drugs in wormers.
Sadly, the vet was just here to put down a horse, so I did get the chance afterwards, to ask him about this to be sure.
dopeychristy, this had nothing to do with you and ivermectine, it was abut horses and worms.
I asked him about suing the ivermectin for the dogs and he said to be sure to speak to the dog's vet first, to make sure you are using the proper amounts, or it could get ugly.
brabs, you are on the west coast, I am on the east coast, I have no idea idea if that makes a difference, but something to ponder.