The only morphs with issues are spiders (wobble) and caramel albinos (prone to spinal kinks). Wobble is usually harmless. Kinking can occasionally be too severe to allow the animal to survive. Cinnamons and black pastels have some unusual snout forms, which can result in 'duckbilling' in the super forms, but this is harmless. As well, 'bug eyes' have occurred in some blue-eyed leucistics, such as super-lessers, but this is also harmless, and it's not clear whether it's actually linked to the morph itself, or is a separate trait brought out by inbreeding.