They are all from Mallards (except Muscovy), so their needs are similar, with minor differences. I would consider size though. Since you said, he, I assume your Pekin is male. I would stick with large duck breeds like Appleyards. That way, a newcomer will have an equal chance and not be bullied by a bigger duck. If you are hoping to get a female, size is even more important. I would encourage you to get more than one female to prevent over mating. If you only want one more duck I would stick with a drake.
Tractor Supply doesn’t sex the animals, so it’s just like you wait and see what you get, so we are getting 2 and giving one to our friend once they grow feathers and can get incorporated with the flocks
Since TS gets its ducklings from Hoover’s and Hoover’s sells sexed-ducklings. Your probability of getting drakes seems to be increased. I still would go for a larger type. And, as Jenbirdee said, if you end up with a girl, you don’t want to put her with a drake until she is sexually mature.
