dinosaur anyone?

FINALLY had a chance to take linus outside and he seemed to enjoy it as any cham would i just feel bad because of my school and work schedule, i go to school 4 days a week and work full time on top of that, so i leave before it gets warm enough out, and i usually come home after dark...

anyways, does anyone else think its unique how he has a "growth ring" on his horns..you can clearly tell how long they were when i got him, and the ring may be caused by a large change of events and a different supplementing schedule...anyone find out anything if calcium has anything to do with how long their horns grow, or if they grow straight, what color they are, or if it is purely genetics? i know it happens with horses hooves sometimes, specially when the spring nutrient rich grass comes up, i know my horse always had a growth ring on her hooves that time of year from the sudden change in nutrient intake...