I have 3 years old Hermanns called Noggin, I have had him for a few months the shop told me to use herbifloor for his substrate but he constantly digs or climbs when he uses this floor, have found him on his back on a few occasions. I change it for soil and sand substrate to which he would not stop eating it and was then just sleeping all the time and looked lifeless he forever needed a bath and as it nade his eyes cloggy as he loves the water. Is there anything i can use or what should i use as dont want to make him ill.