Here is what I had purchased
https://www.valleyvet.com/ct_detail.html?pgguid=ffe25fba-80cb-4d81-8e2a-bc1848a64ca3&gas=16532
I had used an old dropper from a poly-vi-sol bottle to apply it to their neck.
I have used it before when Sevin dust didn't work and I must say it worked great. I got the Ivomec pour on and I ordered it from Valley Vet. It is a bit pricey but it does work where others have failed. I used about 3 drops for bantam size chickens and depending on the size you can do the 5-7...