What kind of images could be right for this group? It could be a double portrait, with one cat and one owner, or it could be a group photo, with a number of cats or owners. Or it could be something more unusual or experimental.
It would be good to see the group photo pool develop in interesting ways, as members find new ways of approaching the subject.
For example, either the cat or the owner could be suggested rather than directly represented. A wide range of approaches would be interesing.