| The best
way to determine if a goat needs to be wormed is by checking their
inner eyelid for the color. The darker pink the inner eyelid is, the
fewer worms they have. The whiter the inner eyelid is, the bigger
the worm problem and the more anemic the goat is which means they
need worming. This basically comes from part of the FAMACHA method
that is described in the picture to the right.
However, we have
customized the FAMACHA system and don't use their color chart or
completely follow their required actions for each color. Here are
the reasons why we don't follow the FAMACHA system.
- It requires a
person to attend an education program before getting the chart
and the majority of the education has nothing to do with the
chart. It covers management options that can be put into a book
or pamplet without requiring a person to attend the class.
- It is difficult
to tell the difference between most of the color levels other
than 5, which is white.
- The color on the
chart can fade and no longer be useful as a reference.
- We have seen
different levels of color from those shown on the chart.
- A person using the FAMACHA system
does not understand the relationship between the amount of eggs
in the fecal compared to the color of the inner eyelid
until they actually do fecal testing to equate the number
of eggs to the color.
We decided to develop
our own approach that would lead us to the same results. We started
out by going through all of our herd, looking at their inner eyelids
and collecting fecal samples from the goats that had significantly
different color in their inner eyelid. Then we did fecal tests of
the samples to get an idea of the worm load and try to relate it to
the color we saw in the inner eyelid.
The results were
dramatic. It went from one fecal sample having worm eggs all over
the place to having to look around the slide to find any worm eggs.
All of a sudden, it became very clear what the different colors
meant related to the load of worm eggs they had. We don't calculate
specific egg counts. We can understand the difference between lots
of eggs and very few eggs seen in the test.
Although, earlier I
said it is difficult to differentiate the color seen in the inner
eyelid to a 1 through 5 color, we did come up with 5 different
choices to document the eyelin color as we examined each goat. At
first we used a 1-3 system with 1 being dark pink and 3 being white.
But as I would go through checking the inner eyelids, I
concluded that sometimes the color of one eyelid was darker than the
ones I had been calling a 2 but it was not as dark as the ones
listed as a 1. The same thing occurred between 2 and 3.
What we ended up
doing was adding a plus and minus to eyelids identified as a 2 if it
seemed to be a little darker or lighter than the normal 2. So
we label the eyelid colors as 1, 2+, 2, 2-, 3. And the end result is
that only the 2- makes any difference. We will never worm an animal
that is labeled as a 1, 2+ or 2. They have good blood flow through
the eyelid, are not anemic and will not receive any worming
medicine. If the animal is labeled as a 3, it is wormed no matter
what. The 2- makes us look at the rest of the body and if a doe is
close to kidding. If an animal is labeled as 2- but has good body
and hair condition, we will not worm it unless it is a doe close to
kidding. When a doe kids, her immunities are lowered and she is more
susceptible to the worms and can cause harm to her health.
The 1, 2+, and 2 are
only to allow us to look at the records to see how strong the blood
flow was and see if we can relate it to their offspring. Resistance
to worms can be passed along in the gene pool and we want to find
genetics that pass along the ability to be resistance to the worms.
We have found several different does with resistance to worms and it
showed up in their offspring also. That is a big plus to us.
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