When to stop feeding Growers pellets?

[BlooBanana]

My duck is coming up 6 weeks so I'm gradually introducing her to Growers pellets, when should I stop feeding her them?

Thanks

 

[RubberDuckee]

I do no know the exact time period to stop the grower and switch to a sustainer feed. My vet recently told me that since ducks are usually grown around 10 weeks old that I should go ahead and switch to sustainer feed. So, I am transitioning mine to sustainer now and mine are 15 weeks old... Hope that gives you some sort of time frame...