You can set two alum pans in a large pan or on a baking sheet. You always need something under an alum pan if it's going to be heavy so it can be lifted in and out of the oven without bending.
If you're reheating in the oven and don't want foods touching, you can use alum foil to create individual pockets in the same pan.
Do let us know how it turned out. Did you use similar seasonings for both?
It's supposed to mean that if the chicken cooks before the turkey is done, juices from the undercooked turkey could contaminate the fully cooked chicken.
How gross is that chicken/turkey thing! Dine on one while you die over the other.
This is why some people get sick and the others don't. Unless they all have the gravy. The clues are coming together. It was not the professor in the library; it was the chef in the kitchen.