I've been playing around with fecal egg counts to keep a handle on parasite loads on our farm. But Dr. Dahlia O'Brien
doesn't actually recommend egg counts in that scenario. Instead, she
thinks the tests are most handy for determining contamination levels of
pastures (rather than animals), for telling which parasite species are
in your herd and which drugs those worms are resistant to, and for
determining which animals to cull (those with high parasite loads that
seem healthy and thus are spreading the worms to the less resilient
animals).
What should you use
instead to keep an eye on individual animals and determine if they need
to be dewormed? The five-point check is a quick and easy technique that
can be used on goats or sheep to eyeball their parasite levels in a
minute or less. Start by using the FAMACHA method (more on that in a
moment) to assess anemia due to barberpole worms via the color inside
the animal's eyelids. Next feel along the animal's back to get a body-condition score
--- low fat equates to general ill health (or not enough food in heavy
producing animals). Check under the tail for scouring (diarrhea), which
is a sign of coccidia infestation (a non-worm internal parasite that can
do a number on animals' intestines). Look for bottle jaw (a swollen
jaw), which is an extreme sign of parasite infestation. Then check the
nose for discharge (in sheep) or check the coat quality (in goats) as
another overall health indicator.
I
suspect many of you use the five-point check (or parts of it) without
even noticing. Of course you'll pay attention to a goat with a scruffy
coat or a sheep with a daggy bum (as they say Down Under). Once you
learn where your animals hold their excess fat, you've probably gotten
into the habit (like I have) of feeling for fat every time you pet the little spoiled darlings handle those important farm livestock. Only the FAMACHA test really requires additional explanation.
And, unfortunately, that
explanation is pretty intense. In order to become a card-carrying
FAMACHA expert, you have to attend a full-day workshop about that topic
alone or take this online course complete with video test. I'll bet you know what's next on my educational agenda....