You're welcome! If you decide to get something for their water you could try Wormout Gel. Dose is about 47ml per gallon and repeat in ten days.
http://www.allbirdproducts.com/newproductpages/worm_out.html
Very expensive!
-Kathy
With so few hens you could get a small bottle of Valbazen:
Affordable Valbazen - 60ml bottle for $14.95
Give 0.08ml per pound orally and repeat in ten days.
-Kathy
Dawg53 is the one that educated me about ivermectin, and since my "education", I have seen many posts from people that have lost their birds thinking that it was effective wormer.. How many birds do you have?
-Kathy
All drugs with ivermectin are not effective poultry wormers, but again, if you have your heart set on giving it, and giving it topically, then what you want to give is a pour on product like this:
https://www.valleyvet.com/ct_detail.html?pgguid=88d16585-22c4-4eeb-a3ff-431f14ee5377
Dose is...