Hi, I have 3 red foot tortoises & I notice more & more as they grow all 3 of them poop less regularly even when being fed daily. They eat sometimes separately to make sure no one is competing for food & are fed a wide variety of greens, fruits, tortoise feeds, vegetables & proteins, they get plenty of exercises roaming on an outdoor grass field with at least one hour of direct sunlight 4 days per week & I understand all this should promote food digestion as I read tortoises poop on a daily basis & not once every 3-4 days as with mine.