I have two reds foots, the bigger one is almost a yr. With me, they both eat a lot, twice a day, a few days ago i change substrate, mixrd of cocopeat, orchid bark, n spagnum moss, before than both of them are eating fine,before my substrat is moss n paper only, but since the time i change it, the bigger one is eating less n less each day, but the small one has the same appetite as before, pls advice me what would be the problem with the bigger one? And the bigger one burrows a lot since then, i think she healthy, still active, the only prob is losing appetite