So I did the first dose on 12/23. I know the 10- to 14-day mark would have been Jan. 2 to Jan. 6, but I didn´t do the second dose until Jan. 9. I will surely do the third dose between Jan. 19 and Jan. 23, but will I have to then count that as a second dose instead of a third? In other words, since I waited 17 days in between the first and second dose, do I have to start all over?
I think I did a full Ivomec party (where all pigs got 3 doses) twice last year, once in April/May and once in the fall. With so many different critters coming and going, I feel better treating them every now and then in case someone has a problem I´m not catching.
If you are giving your second and third doses within 14 days, that will probably take care of them.
- I GAVE, dammit!
Ivermectin does not kill lice eggs. So if after 3 days, new lice hatch, then the second dose kills them before they lay more eggs. And the third dose makes sure nothing new has hatched. With a 17 day lapse, they might have hatched AND layed more eggs.
So if you are concerned, just use the second dose date as the first. On particularly stubborn mites, I´ve had to dose pigs a fourth time anyway. Doesn´t seem to hurt them.