Hi my cat is a 4 year old male and he's always hated collars. He would always take them off and leave it somewhere. I left him collar less for a little bit, like a year because hes indoor. The I had a velco one and he was sort of okay with it then all of a sudden wasn't and would always scratch at it. I thought it was maybe itchy, so I got him a nylon one, then he didn't like that one either and I got him a hypoallergenic light silicone one. And he still scratches at it and sometimes shakes his head. The itching and shaking head every now and then was a bit concerning and I took him to the vet. They said he was fine so I have no clue why he does it. Anyone have a cat that just hates every collar that comes its way? There's no bell on it either so it can't bug his ears.