He eats all day - How come he's not overweight?

[chezron]

Brutus eats for HOURS. He weighs about a pound. I would think with as much as he eats he would be overweight. Why don't greys become overweight like amazons? Does your grey eat all day too?

[Ray P]

My grey eats all day also, but she is very active and always flying around. My zon would rather walk or climb to the spot she wants and sit there and watch what`s going on.