That's a side effect of something?
30+ days in the field eating nothing but MREs, yup, bricks (as in shitting, 1 ea.) are a definite side effect, no matter how much water you drink. We had cases where aftwe 40+ day field exercises, whole teams were admitted to the Hospital because of the effects of MREs on the digestive system - usually after water deprived exercises. Ugly, really, really ugly.