Their target demographic has no desire for an RPG. The devs themselves likely doubt the sense or purpose of one. For them it's the Brawndo argument in reverse.
Someone should mod that chickens with crippled heads are missing them; with no ill effects besides full or partial blindness.
Someone should then script that chickens with missing heads can have lit dynamite pickpocketed into their neck(s), and have them wander around in or out of combat...
I'll tell you a game that I like, but I gather that it's somewhat of an acquired taste.
Any of the Disciples 2 series of strategy games. I can tell you that I decided to try it out for half an hour, and I played it for eighteen hours without a break.
https://www.gog.com/en/game/disciples_2_gold
Could those rear hips be part of a vestigial Twin?
The rear and fore knees bend in opposite directions.
(So... it seem like two avian pelves joined at the butt.)