HELP!! I have 3 backyard chickens and noticed roundworm in the faeces 2 wks back. Easy enough to solve you would think. I went and got worm medications administered 1st dose easy. When it came to administering the back up dose 2 of the worst affected hens refused to drink it! This is after withholding water the previous night and it being the only available drinking water that day. Gave up that day & tried again this wk Bloody little buggers wouldn't drink it again.. Tried mixing it into the favorite treat yogurt to no avail.. My question is can i administer straight into crop to a hen?? or is there any other suggestions for me to trick the pesky hens into consuming worming medication. Thanks in advance for any much needed advice.