Why have our eggs gotten smaller?

[enola]

A local told me to use safeguard horse wormer but he has no idea how much to give a chicken.  I looked it up online and rural king has it.  It said it has fenbendazole in it.  Now to figure out how much to give.

Pm casportpony, she has the dosages

 

[csk021]

Do you have evidence they have worms? Are they very thin?

They aren't extremely thin and I haven't found obvious evidence of worms but since I never wormed in the 7 years of having chickens maybe now is a good time and going forward make it a point to do when they're molting. Especially since I can't find anything else that's effecting the egg size I think this sounds like my next attempt at resolving it.