I think he means don't bother with a collar and just get them micro-chipped instead in case they get lost. My cats don't have collars.My previous cats had them,hated them and nearly always lost them.
surbabu - how is that relevant? you keep posting that on questions in here, sounds to me like advertising.
MWB, I know your problem, my ASBO loses collars within minutes normally. I gave up with the magnetic flap and now just spend a fortune on feeding every cat in the neighbourhood.
sorry MWB,
as ganesh said, i was referring to IDing your pets with a chip and getting rid of collars altogether. Change the cat flap to a standard one.
You can have it for nowt if I can find it! (Bear in mind that this house is not the tidiest of places and it will be like looking for a needle in a haystack!)
Just had a thought - can you get them off ebay cheaper?