I have an Excalibur dehydrator and have done the dehydrated chicken. I’ve never been happy with the consistency when re-hydrated. More often than not, even after 5-8 minutes, the chicken portion of the meal is still crunchy. The chicken I dehydrated was the canned pre-cooked chicken one usually finds in the supermarket next to the tuna and spam.
I’ve since given up and gone to freeze dried chicken, where the results have been so much better and consistent. I’m still playing around with ground beef, particularly in my own dehydrated spaghetti with meat sauce. I add the ground beef as part of making the sauce.  In my latest batch, I made the ground beef super fine by giving the cooked ground beef a quick spin in a small food processor before adding it to the sauce and dehydrating. I will know next week whether this yields better results or not.
I’ve read some suggestions to add bread crumbs to ground beef to improve the FBC results, but I don’t quite understand when/where the bread crumbs get added.