I tried to get them to wear collars but they both did a Houdini and escaped the collars several times. I wish I could get Calvin to wear a harness so that we could go for walks. I think he would enjoy it but I guess it would also expose him to other dangers like diseases. I know of cats that have choked to death on collars. I'm going to get them chipped but after our bad experience at the vet this week I'm reconsidering doing anything that might make them ill or stressed.
Claudia