I have 15 chickens which are all about 4.5 months to 1 year of age. I have never wormed them, and they are showing no signs of having worms. My question is.....Is it a good idea to go ahead and worm them??? I bought some Wazine at the feed store the other day just in case. It says to use it on birds younger birds( 4-6 weeks i think), not adult egg-laying poultry. They all seem healthy, i just wondered if i should worm them anyway? or should I use a different wormer? or just leave them alone. Thanks for any advice!