He’s Hiding All the Time
There are many theories on why cats hide when they are sick. “Some experts believe that in the wild, a cat would instinctively hide in order to stay safe, as being ill made them weak and susceptible to predators,” says Dr. Ryan.
“Others believe that cats hide when they aren’t feeling well because they simply want to be left alone to sleep and recover,” continues Dr. Ryan.
According to Dr. Ryan, hiding can be connected to any type of cat illness and it could also be a sign of injury, stress, anxiety or fear.
All cats need to take a break at times, but if your cat starts to disappear on a regular basis for long periods of time—and especially if there are also changes in eating and drinking habits and other behaviors—it is time to talk to a vet.