For example, Babycakes Loveland has a very smushed in face and Mozart Miller has a strange facial structure, and by breeding them to each other and also different cats I found out that their offspring comes out very deformed, and although most of them will grow into themselves just fine sometimes they will keep these deformities when they grow up, if they grow up at all. Sometimes the pets born with these deformities will refuse to age up. However, I must tell you to be cautious when breeding pets with severely smushed in faces, pets with too small eyes, pets with too-small heads, or other such deformities as it will be very likely that the baby pets will inherit them and come out looking quite strange.