What is the best food for fatten up ducks, Costco 30% protein Cat Food or something else?

[Alta Sierra Ranch]

My partner feeds our meat bird duck Costco cat food, because it has 30% protein. We also feed them a chicken crumble, and meal worms.

 

[nuthatched]

What breed of duck? have you tried meatbird grower? catfood isnt good long term. what type ofchicken feed?

 

[Alta Sierra Ranch]

What breed of duck? have you tried meatbird grower? catfood isnt good long term. what type ofchicken feed?

Purina basic chicken with meal worms and that white rocky stuff.

 

[Quarterhorses1]

Purina basic chicken with meal worms and that white rocky stuff.

Oyster shell?