[Alpacasite] Stubborn internal parasites

Hi all,

As I mentioned previously, I feel like we've almost won the war against our
internal parasite problems. We've lost a few battles along the way, and I
have one female at the moment that isn't responding to the prescribed
treatment.

This girl is seven years old, pregnant, with no cria at foot. She is in
good condition with a high body score. She had a fairly high fecal egg
count and we gave her the three-day treatment with Oxfen, a "white" drench
similar to Panacur. This treatment has worked quite effectively on 45
other alpacas in our herd. Three weeks after giving her the three-day
treatment, her FEC is through the roof again. My best guess is that the
parasites are Haemonchus, but I'm not really qualified to say with
certainty. The rest of the herd have almost zero FEC's.

Why didn't the three-day treatment work on her? Her FEC wasn't any higher
than others where the three-day treatment did work. Is it possible that her
internal parasites are resistant and those in the other alpacas are not? I
know that she did not spit out any of the drench.

At this point, she is on day two of a multi-day treatment using the same
oral drench. Here are my questions:

1. Should we just give her a repeat of the three-day treatment or

2. should we give her a five-day treatment or

3. should we give her a three-day white drench treatment plus a Dectomax
injection or

4. should we give her a five-day white drench treatment plus a Dectomax
injection or

5. would you recommend another course of action.

Our vet recommends the first course of action (#1 above). I prefer either
#2 or #3. Ignoring the indicated preferences, what would you do?

Regards,

Chuck Rademacher
Auckland, New Zealand

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