As keepers walk through the gates, they reflexively grab and pull them shut. The animals are brought here at night, where they are housed and fed individually. In the morning, keepers look into each cat's enclosure to see if the cat has eaten and to ensure that it is healthy by, among other checks, inspecting the color and consistency of the cat's feces. Wild animals are instinctively stoic and usually try to hide any signs of illness or injury, so keepers track each animal's behavior carefully and must be able to recognize subtle cues. A clipboard where keepers mark behavior is posted on the door of each cat's enclosure.
Keepers look for patterns.
For example, they know Kerinci is a finicky eater. They won't worry if she doesn't eat one day, but if her food is untouched for a few days, they'd consult one of the Zoo's veterinarians. Before moving the cats into exhibits, keepers walk through the yards to clean up yesterday's feces and any debris. Despite the popular perception, keepers do not enter the enclosures while the cats are in them. They're used to a routine, but that's not the same thing as being a pet.