My cat is being treated for an eye infection and part of the vets current instructions include him wearing a cone to keep him from irritating the eye further. His little brother loves to groom him and will still be able to with the cone on. Is there a way to fix it so he can’t get in? They’ve already spent two weeks being separated most of the time and are miserable without each other. Also how far past the end of kittys nose should the cone come to keep him from being able to groom his face? The cone seems a bit long and he’s having a difficult time navigating the stairs and things