Re: [Alpacasite] Parasite control

Just as food for thought......................I have a friend who lost 4
alpacas over a period of 4-6 months pastured on a property dominated by
Garry Oaks. We were not able to find a cause of death, even with
necropsies, so took the surviving animals off this property. They have been
okay since that.

I guessed that the problem on this property was either something in the
water, or the oaks. This property has been grazed by both goats and sheep
for many years with no similar problems. Whatever, I feel we saved the
lives of survivors by removing them from that place.

Barrie Hanslip
Sooke, BC

> I have seen prior references to tannins as a parasite control. Black
> walnut shavings are a problem with bedding for horses and the tannins in
> oak leaves, bark, and acorns can be a problem when ingested apparently
> in large quantities. From Drs. Walter & Knight, "The principal toxin
> [of oak] is gallotannin, a polyhydroxphenolic combination of tannic and
> gallic acid. The tannins found in the leaves, bark, and acorns of oaks
> produce poisoning through their effect on the intestinal tract and
> kidneys. Gallotannins are hydrolyzed in the rumen to smaller molecular
> weight compounds including gallic acid, pyrogallol, and resorcinol.

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