Check the nutrition info on the bag and do the math to determine carbs by weight.
Then do the math to estimate calories from each of protein (3.5 per gram), carb (3.5 per gram), and fat (8.5 per gram)
Finally, divide the calories from each source by total calories to get you percentage calories from source.
Or maybe try the freeze-dried chicken, meat, or fish as a treat since these crunch.