- At least eight spikes; two each on the head, neck, back (/ base of the tail) and tail (not fully covered with fur; spikes must remain visible)
- One to three sets of ears with a spliced ear tip
- When walking on all fours, the hips are higher than the shoulder.
- Missing limbs
- Mechanical wings (non-biological)
- Taller or smaller than average
- Prosthetic limbs
- Multiple limbs (mutation)
- Hairless (mutation)
- Spikes on other body parts (e.g.: arms, legs, ...)
- Broken spikes (and being alive)
- Biological wings
- Special abilities (e.g.: fire breathing, telekinesis, shape-shifting, ...)
- Mixed with other species (hybrids)
- Zombie/ ghost/ undead
- Unrealistic sizes (giant or micro)
- Transparent skin
- Feral Drabbea