I often cook chicken in the crock pot. The new crock pots get hotter than the old ones, because of the above-mentioned reason, ie. not getting hot enough to cook the chicken safely. It takes about 4 hours on medium.
I cooked a lot of chickens in my old one, also, and never got sick, but they never took 8 hours to get done, either. I use fryers, though. I guess if you used roasters, they'd take longer.
It really is an easy way for a working person to get supper going. I just put in the chicken, S&P, and a cup or so of water or a can of soup or broth. The bones slip right out when it's done, you have good juice to add to your dish, and the meat does not dry out.
If you want to cook vegies with it, the instructions for most crock pots say to put them around the sides, as that's where the heat comes from. My newer one, though, says to put them on the bottom.
Give the slimy skin to the dog or cat. (Cut it in pieces, so they won't choke.)
We get by with a little help from our friends