I use my dehydrator to make treats for the dogs all the time
A favorite is turkey jerky, which is basically ground turkey with a dash or two of garlic powder (not garlic salt) I roll out the meat between two pieces of wax paper and then cut into strips (while still between the wax paper because turkey is too mushy)
I remove the top layer of paper and place on the dehydrator paper side up, then peel off the paper. Follow the directions on your own dehydrator for dehydrating times.
Other favorites include sliced sweet potatoes, and liver bits. With the liver bits, I boil a little first then chop them up. Sometimes I just toss in the oven instead of dehydrating.
When storing, I normally store in a plastic container with a loose lid. You can store in the fridge if it makes you feel safer