Gizzard

The Gizzard is a mutation that makes Kiseilian neck bigger than usual.

Luckily this trait seems to make them more attractive than common Kiseilian, especially if the specimen is male: due to this, Kises with Gizzard (male and females) have a chance to get a nest bigger than usual that their rank allow. 

Colors must follow the basecoat and marking rules, you can replicate markings on it.