I have 2 ducklings from TSC as well. I am feeding mine the chick starter, it has a picture of a duck & a chick on the front of the bag. They are growing like crazy!!!!
We have a mixed flock & love all of them.
2- Buff O's, 2- Easter Eggers, 8- Black Sex Links & 2- RIR
They all get along great. We just finished building a new coop & run. Just got them moved in on Saturday. The Buff O's & EE are about 6 months old & are not laying yet. We can"t wait for the EE's...