I'm a zookeeper and I thank you very much for your comment. Animal welfare is always our top priority and one of the key components of that is nutritious diet and regular enrichment to keep the animals healthy and active. And of course we weigh them regularly to make sure they are healthy. If they are gaining when they shouldn't be, diet is decreased and/or enrichment increased. Funny how fat people seem to think the rules of nature, rules that apply to every other living thing, somehow don't apply to them lol