I've not seen anything of rodents in the bedding. I think the chickens would be a big deterrent to that, as mine would eat any mouse small enough to fit into their mouth and throat. They also tend to rearrange the bedding quite a bit as time goes along, so any mouse or rat burrow would be torn apart and shifted too much for comfort. Maybe in large poultry houses this would be a problem, as those chickens probably do not shift the bedding much?
I also do not use straw, so that might be a factor as well...could be they would nest in straw much more readily than they would in smaller fragments of wood shavings, leaves and pine needles.
I've also not had any foul odors; on the contrary, the DL actually decreased coop smells, particularly in the summer months when smells are the highest. Ventilation is key to moving any ammonia produced by the composting up and out of the coop, so when I didn't have proper ventilation in the coop I noticed some smell more....a few simple adjustments took care of that.
Now, with feeding fermented feeds, the feces don't even have a smell and they practically disintegrate in the bedding, as the contents are predigested by the fermentation and then more fully digested by the bird. No smells except earthy, soil smell one would experience if they smelled forest floor debris/soil.
My 79 yr old mother is constantly amazed at how the coop has no smell or flies in it in the hottest part of the summer, which is not how she remembers raising chickens...chicken poop smells and that's a fact of life, or so she thought. She wished she had known about using deep litter back in the day and so do I. To me it's nothing short of a revelation and same with the fermented feeds...we used them on hogs back then but never thought to use them for chickens.