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Plus being not necessarily great for respiratory health. I quite agree.
I think the confusion is because several VERY VERY DIFFERENT things are all getting lumped under the same name of "deep litter method". I post this periodically and guess I will again
...
one thing often called DLM is "my litter is really deep" but maintained normally otherwise, i.e. cleaned out regularly. THis provides floor insulation and something for hens to snuggle down into on cold days and dries out poo.
another thing often called DLM is "I don't clean my wood-or-cement-floored coop very often, although I add fresh shavings sometimes". This dries out poo somewhat, although not nearly as much as if you replaced the bedding more often, and it saves on labor and bedding costs.
The classical old-timey DLM is "I don't clean my earth-floored coop very often, although I periodically fluff it up and frequently add more litter, and I let the litter get mildly moist (like garden soil), and it starts composting down in place". This does not dry poo out but it composts it away to a large extent; it provides a bit of heat, at least if you have a lot of chickens in there to provide plentiful 'fuel'; it reduces the total volume of stuff to be removed from the coop over the course of the year because the bedding will lose a certain volume as it composts; before store-boughten feeds added all the vitamins they do today, it helped counteract a particular nutritional deficiency as the chickens ate microbe-processed stuff from the litter; and of course it saves on bedding costs and labor.
You can't do the latter, classical form (with the composting) without an earthen floor and litter that is noticeably more humid than you would otherwise have.
All of these are perfectly legitimate management strategies IMHO depending on the situation; it's just important not to get 'em mixed up in terms of what you expect.
Pat
Plus being not necessarily great for respiratory health. I quite agree.
I think the confusion is because several VERY VERY DIFFERENT things are all getting lumped under the same name of "deep litter method". I post this periodically and guess I will again

one thing often called DLM is "my litter is really deep" but maintained normally otherwise, i.e. cleaned out regularly. THis provides floor insulation and something for hens to snuggle down into on cold days and dries out poo.
another thing often called DLM is "I don't clean my wood-or-cement-floored coop very often, although I add fresh shavings sometimes". This dries out poo somewhat, although not nearly as much as if you replaced the bedding more often, and it saves on labor and bedding costs.
The classical old-timey DLM is "I don't clean my earth-floored coop very often, although I periodically fluff it up and frequently add more litter, and I let the litter get mildly moist (like garden soil), and it starts composting down in place". This does not dry poo out but it composts it away to a large extent; it provides a bit of heat, at least if you have a lot of chickens in there to provide plentiful 'fuel'; it reduces the total volume of stuff to be removed from the coop over the course of the year because the bedding will lose a certain volume as it composts; before store-boughten feeds added all the vitamins they do today, it helped counteract a particular nutritional deficiency as the chickens ate microbe-processed stuff from the litter; and of course it saves on bedding costs and labor.
You can't do the latter, classical form (with the composting) without an earthen floor and litter that is noticeably more humid than you would otherwise have.
All of these are perfectly legitimate management strategies IMHO depending on the situation; it's just important not to get 'em mixed up in terms of what you expect.

Pat