I also use the term kitty dog to describe one of my cats,Sky,because he's so outgoing that when people come over he comes right up to them. He loves people very much. My girls will usually hide and sometimes Pearl will come out to play with toys if you entice her enough. Ziggy can only be seen in pictures. She's such a gorgeous girl but she's very afraid of people that she doesn't know. Storm will usually also come out to be petted etc. but sometimes if he's sleeping he won't bother. Not all cats are outgoing and friendly to everyone so this is why I consider my Sky a kitty dog.