To answer your question: there is no more a chance of them getting worms this way than any other way.
Chickens are crap eaters: plain and simple. The parasites they pick up though comes from eating the dirt. Chickens eat lots of dirt.
By the way, I hate the deep-litter method. It is an out-dated method that was done away with by farmers and commercial folks years ago because it is a disease habitat. It only came back into vogue with the re-publication of some old 19th century text. It's a crock.
Chickens are crap eaters: plain and simple. The parasites they pick up though comes from eating the dirt. Chickens eat lots of dirt.
By the way, I hate the deep-litter method. It is an out-dated method that was done away with by farmers and commercial folks years ago because it is a disease habitat. It only came back into vogue with the re-publication of some old 19th century text. It's a crock.