Rinse off chicken breast strips and remove any fat. Slice the chicken with the grain. Next, coat the chicken slices with your dog-friendly seasonings.
Place the chicken breast strips in an even layer across the entire tray, leaving an equal amount of space between pieces and making sure that they do not touch each other. This is so air can flow between them while they are drying out, which helps dehydrate them.
Once the strips are all set out, place the trays in the food dehydrator, turn it on and set the temperature for 140° F. It will probably take between 3 and 12 hours for the chicken to fully dry, depending on how thick you cut your slices and the exact temperature of your food dehydrator. Check the strips once every hour after the first hour. To do that, simply open up the tray and take one slice out; cut it open with a sharp knife and examine the inside. You should see no moisture at all, and if it is properly dried, the chicken will have the same color throughout. If it is not finished, put it back in for another hour. Once it gets close, start checking once every half hour.
(In an oven, bake the chicken strips at 200° F for approximately 2 hours.)
Once your chicken jerky is done, store it in sealed containers; zip-locking bags work great for this. Write the date you made it on them. You can also store the finished product in the refrigerator for an even longer shelf life.