I'm on year 42 of my current franchise zoo and had never once seen a guest thought regarding litter...nor seen litter on the ground for that matter, and I've had food and beverage in since before I built a real habitat. Until now.... I was pretty proud of my 4 caretakers (and myself for setting good work zones for them) so I scoured the whole zoo and I only found one tiny bit of trash. 5% of guests show as having the thought "This litter is disgusting"....over this....: