Thanks for getting back to me. Apologies for the delay in my response, I was called out for an emergency.
You stated that Cardigan’s condition seemed to start following de-worming, which suggests to me that when he was de-wormed, he most likely had a large worm load. When worms are killed by de-worming, they release toxins that can cause an animal to become somewhat ill, and at times, if the worm load is large enough, can actually cause a partial obstruction within the intestinal tract. Also, if Cardigan was not de-wormed again after the initial deworming, it’s most likely that the remaining worm eggs hatched (as de-wormers do not kill the eggs, only the worms), creating yet another heavy worm burden. It is highly recommended to de-worm ten to fourteen days after the initial de-worming to kill the worms that have hatched from the remaining eggs, before they can become adults, or otherwise you’re back where you started!
It is most likely that Cardigan’s problem is still parasite related, based on the history you have provided, as well as all of the symptoms that you have described. I would strongly recommend that you consider having a fecal analysis performed on Cardigan ASAP. If you don’t have access to a Large Animal Veterinarian, most Small Animal Clinics can perform fecal analyses for sheep/goats as well. It is best to obtain a fresh sample when dropping it off for analysis.
We are also seeing a large amount of worm resistance to many of the common de-wormers that used to work well, so there is a good possibility that the de-wormer that was used on Cardigan may have had little effect. This is why having a fecal analysis performed is extremely important. In my practice, I see too many animals become ill and/or die due to worms, so it is definitely not something to take lightly.
Again, please consider having him checked for worms (and there are more than one type that could be affecting him) as soon as you are able. It is much less expensive and easily remedied, than to treat him if he begins to worsen.
Thanks again for getting back to me, and please let me know if you have any further questions.
Please stay in touch (you can use this same thread) and let me know what you find with Cardigan.
Best of luck!
Dan C., DVM.