Heidi's comments:Feral Cat Den (aka Feral Cat Handler) - When you must hold a cat for several days for recovery from an injury or extensive surgery, the den provides a quiet hiding place. The den can be placed in a larger holding pen or large cage where the cat is being held, along with a litter box, food, and water. The cat enters the den by a porthole on the side that you easily slide shut once the cat is inside. You can then take the cat for cleaning, treatment, or transportation. A vertical sliding door makes it easy to transfer the cat to another cage or return the cat to the den for recovery after surgery.