Equimax is a soft paste. It can be drawn with a syringe without a needle.So just squirt it in their mouth with a syringe, kind of like you do with cats, rights? Sorry, never given my chickens meds before lol.
Have someone hold the hen for you firmly, preload your syringe. Then pull the wattles down and her mouth will open. Shoot the paste out of the syringe into her mouth and quickly let go of her wattles so she can swallow the paste. Release her and reload your syringe for the next hen....and so on. Easy peasy.