This was my first time worming the chickens, and I'm starting to second guess myself! I used "Agri-mectin" paste. It's a 1.87% ivermectin paste, and after all my reading, I thought the Ivermectin was the best for the chickens. I picked up each chicken, and placed a really small dot of worming paste on the skin under each of their wings. I know I applied it correctly, but I'm second guessing my choice of wormer. . .should this be ok?! The package says horses only, and it could be fatal in dogs. . .I didn't see that until just now. . .I'm assuming that's if it's ingested, and not through the skin absorption? Can someone confirm I did the right thing with the right medicine??!!