Are these safe for egg laying chicken though?Tapeworm looks like this:
If tapeworm is what you have then you will need either equimax horse paste or zimectrin gold (med is praziquantel) to treat. Vinegar will not treat them.
Dosing is in post #6 here:
You can get amoxicillin (fishmox) online, you can get SMZ-TMP online as bird sulfa, you can get enrofloxacin at pigeon suppliers on line.