The first candidate for a Challenge 2 Dinosaur that springs to mind is an
Allosaurus.
Would agree that'd be turning a Moa "up to 11" if not higher!
As I said earlier, I'd be OK using Axe Beak stats for one of the two species of Giant Moa (the 500+ pound ones that might have gone up to 12 feet high) only with the Beak action changed to a Kick.
Although upon reflection, they probably wouldn't have been as fast as an Axebeak, so I'd probably cut the Speed to 30 ft. or 40 ft.
For a regular Moa, CR 1/8 or so would match what I had in mind. Something like this would do:
Moa
Medium beast, unaligned
Armor Class 10
Hit Points 11 (2d8 + 2)
Speed 30 ft.
STR | DEX | CON | INT | WIS | CHA |
---|
11 (+0) | 10 (+0) | 12 (+1) | 2 (–4) | 11 (+0) | 5 (–3) |
Senses passive Perception 10
Languages —
Challenge 1/8 (25 XP)
Proficiency Bonus +2
Actions
Kick. Melee Weapon Attack: +2 to hit, reach 5 ft., one target.
Hit: 3 (1d6) slashing damage.