I have been on these boards for years, but mostly as a lurker! I sometimes have something to contribute to the dairy goat forum, as that is my area of expertise ;~)
We now have 2, 6 month old Lincoln Longwool ewes that I want to de-worm. I always use a little bit of the horse wormer for my goats. Can I do this for sheep? Does anyone have a dosage for using horse Ivermectin in sheep?
Equine Ivomec paste is 1.87% ivermectin, while the Ivomec Sheep Drench is .08% ivermectin. Ivomet Sheep Drench has a recommended dose of 3 ml to 26 pounds, therefore 12 ml for a 100# sheep would have a concentration of 0.0096ml of ivermectin. If I calculate the concentration in the 1.87% that would equate to 0.5 ml?
That would be about 1/2 the equine dosage....somewhere I thought I read it was to be doubled?
For those who used the horse paste, how do you measure it? Mine has notches of 250# increments so I put it into a syringe-250# =1.5 ml. I ended up dosing .5 ml per sheep (or trying to anyhow). It didn't seem a very effective way of measuring as I'd have 1.5 ml in a syringe and then need to put .5 ml in the mouth -some got more some got less.
I used to (and my dairy goat friend still does) the ivomec paste and dose by weight. I had big suffolk girls so I would just divide the 250 squirts into two. I figured the little bit extra would compensate for the bit they always managed to spit out. Worked very well for us. If I had smaller sheep I would use cannon farms method but I would cut the tip off of a catheter needle so you're not trying to squeeze that thick paste through a needle hole.