I read to pull down the bottom eyelid to see the color as an indicator of worms. Is this referring to the membrane ON the eye, or the inside of the actual eyelid? Also, can I use Zimecterin (ivermectin 1.87% paste) for a goat? If so, how would you measure it, as it's for horses. What about Zimectrin gold (1.55% ivermectin and 7.75% praziquantel)? I have some of that as well. One of the does is pregnant.