I'll agree to all that. Maybe an extra 1d4 acid for the juvenile, 1d8 for the adult, 2d6 for the elder? (One step down from bite damage.)
That works.
Gizzard ACs are 13/16/19.
Damage to cut out should be maybe 5/15/25?
Well, they are only 4HD, but 10/20/30 would work.![]()
We could, but I don't know that I see the need. They're ok as they are.
Skills: dump all the ranks into Spot for locating prey at a distance?
Feats, starting with the juvenile: Alertness, Endurance; Snatch, Blind-Fight, Power Attack; Improved Bull Rush, Awesome Blow, Improved Overrun, Stand Still.
That's not so inspired, but it's a starting point.