I don't know too much about it -would you say it's classified as a fetish? I saw a show on 'people on the outside fringes' and it had a man who's goal was, to look like a cat. IMO this is the extreme side. He had surgery to split his tongue(even though cats don't have split tongues) and metals plugs implanted in his cheeks so he could snap on whiskers. Had implants to get that jowled look. I would like to know what incompetent doctor performed these surgeries. He wore a spandex tiger printed body suit with a long tail, with gloves with claws in public. I don't know if what this man does is related(larger scale) to what you're talking about. He wanted to be a cat not content to just dress like one

On a mild scale I would say it's fine as long as it's not interfering in your quality of life.