Liver Treats :
All you need are beef livers. Try your local meat packers; they often throw them away. Or you can buy fresh liver from the supermarket. Cut the liver into approximately 1 inch slices.
Place in your food dehydrator for 24 hours*. Use Pam or the equivalent on the drying racks, so the liver won't stick. Let dry for 24 hours.
*Or you could place them on a cookie sheet and bake in a 325 degree oven for about 45 minutes to help dry them out.