A quick look, it seems ingredients differ a lot between makers and recipes, but here's a list for Maple & Spice flavour:
MAPLE & SPICE
Real Vermont maple syrup in our Maple & Spice gives it a light, sweet taste combined with the right amount of spices for a unique taste. Available in jerky strips, chews or bits.
Ingredients:
beef
soy sauce (water, salt, hydrolized soy protein, corn syrup, caramel color, potassium sorbate)
maple syrup
worcestershire sauce (water, vinegar, molasses, high fructose corn syrup, anchovies, hydrolized soy and corn protein, onions, tamarinds, salt, garlic, cloves, chili peppers, natural flavors and eschalots)
flavorings
mustard powder
red pepper