Good Evening, thanks for the question.
I am sorry to hear about the problems you’ve been having with your goats. I’m sure you must be frustrated!
I’d like to get some additional information from you please, so that I can give you a thorough answer.
1): Has the anemia been verified through blood testing?
2): Have there been any fecal analyses completed by your Vet to be sure that internal parasites are the problem, and/or also to be sure that the Ivermectin is working (we are seeing more and more parasite resistance against Ivermectin, and it isn’t as effective as it once was. I have worked with some herds where there was no effect against the worms at all)?
3): What does their current diet consist of?
4): What type of environment do they live in (pens, open pasture, etc.?
Also, there are three basic causes for anemia: destruction of red blood cells (of which parasites would fall into this category), lack of production and blood loss, such as internal bleeding. As this is a herd issue, I’m fairly certain that we can rule out the latter two, but it is extremely important to know the cause of anemia in order to properly treat it.
If your Vet has not performed fecal tests in order to be sure that the Ivermectin is working and that parasites are indeed the problem, I’d recommend that you consider having her/him do so. The way to treat anemia in parasitic goats is to be sure that the parasites are no longer a problem!
Thanks in advance for getting baclk to me, and I’m looking forward to hearing from you.
-Dan C., DVM.