I have 9 hens, 3 of which i purchased about 3 weeks ago. The guy i purchased the 3 from said that he had just wormed them just prior to my buying them. I noticed today while cleaning out the coop that there was some small worms in one of the piles of poop and I'm not sure which hen its coming from. Should i worm all but the 3 new ones or should i worm them all? Also, he told me that 2 of the 3 were laying before he wormed them, their not laying for me yet. Should'nt the be after 3 weeks if they were before i got them? Also, Also, 1 of the hens is got runny poop but i see no worms in that. what do you chicken pro's think?