SureFlap Microchip Cat Flap - Brown

It took a week for the cat to learn and start to "trust" the machine. One of my two cats has urinary problems and absolutely cannot eat 'regular' cat food. Life became much easier with a machine that does the job of the 'food police'. The only problem is that the machine takes a few seconds to react to the cat's chip, even when I select the fastest reaction time (there are 3 options).