I don't think I've come across a pellet game bird feed yet.
I've found this:
https://bluebonnetfeeds.com/super-game-bird-conditioning-pellet/
and some others online. I've even seen people here on the forum mention that they feed pelleted gamebird feed. I hate feeding crumble so I'm putting my foot down about feeding a crumble instead of the pellet.
I should also mention that previously they were on Nutrena Layer Pellets and the Starter/Grower and the birds ate a lot more of the feed in a shorter amount of time. Additionally I've seen improvement in molting time as well as issues with legs since switching feeds.