MeowSpace® offers the choice between using a Magnetic Door System or RFID (radio frequency identification device) System. The Magnetic System is much less expensive, and unless you have special circumstances which warrant the use of the RFID System, we always suggest going with the Magnetic. Both work equally well.   The Magnetic System requires your pet to wear a 1-1/2 inch long magnet on its collar. This seems dauntingly heavy to us humans, but it seems even the most feeble of cats have no problem with it. They don’t appear even to know it’s there. I’m reminded of when my son, now 32, was 7, and I used to make him put on a coat, even when he wasn’t cold. He used to tease me by mocking me, “Put on a coat, Corey, Mommy’s cold.” I think we are like that with our furry family members, too. We think, “Oooh, that magnet is way too heavy for my little darling.” In truth, it’s not at all too heavy, and cats and small dogs all over the country are proving more »