How old do muscovy/Rouen ducklings half to be when they eat feeder fish

[paws4440]

Hi I have Rouen/muscovy ducklings and muscovy duckling and I was wondering how old do they have to be to eat feeder fish? What kind of feeder fish? And the beg the fish come in if that water should go in there swimming area of do I strain it? Thanks.

 

[FloridaMikey]

Our muscovy ducklings chased and ate small fish in their bathwater when they were about 4 weeks old

 

[FloridaMikey]

We used wild caught guppies (mosquito fish) around 1 inch long.

 

[paws4440]

Thank you