Best Rooster Food?

[loofa]

Hi everyone,
TLDR: ISO a delicious varied feed for a rooster with no hens, available in the US.
I've taken in a little rescue bantam rooster. I don't have any chicken hens, just a few ducks, with whom he has integrated beautifully. I'm looking for a nutritious food for him that he will love as right now I just have a pellet food that he is not much interested in. He is free ranging with the ducks all day on 1/2 an acre of grassy land munching on bugs and plants, hardly touching his pellets. Which would be fine, but he arrived in bad shape, very underweight, so I want him getting all the nutritious yummies in him I can.
I know there are tons of posts about feed, but using the search function I mostly find rooster oriented posts are focused on if they can eat layer feed or not. I just want to know the bets thing I can feed him

 

[oldhenlikesdogs]

He won't eat much ration if he's free ranging. A good all flock ration is good for roosters and ducks. My free range birds always eat much more ration during the winter months, but barely eat any during the warm months. If he's young being thin is normal.

 

[nuthatched]

An all flock feed ot chick feed