Hi. As the drought progresses we have had to open up our bush paddocks to our herd. I’m noticing more and more ticks especially in their ears. The advice from the vet (none of which are all that knowledgeable about alpacas) Is ivomectin injection. Our seller doesn’t know as they’ve never had a problem with ticks. Is this the right way to go. How often do they need to be treated? Has anyone found a better / more cost effective alternative. Any natural remedies? Thankyou Chrissy