Hello and Welcome to BYC!
If you order from one of the big breeders you can't really be guaranteed that your high dollar "sexed" ducks will actually be what you ordered either. I know that @Runner duck mom did NOT get what she ordered so it could happen.
TSC employees don't usually know much of anything about ducks so I wouldn't even listen to their "advice" if I were you.
Are you aware that pekins are very prone to leg issues because of their weight and rapid growth? It seems like a ton of threads lately has been about just that! Crested ducks have many issues too and I wouldn't recommend them for a first-time duck owner.

If you order from one of the big breeders you can't really be guaranteed that your high dollar "sexed" ducks will actually be what you ordered either. I know that @Runner duck mom did NOT get what she ordered so it could happen.
TSC employees don't usually know much of anything about ducks so I wouldn't even listen to their "advice" if I were you.
Are you aware that pekins are very prone to leg issues because of their weight and rapid growth? It seems like a ton of threads lately has been about just that! Crested ducks have many issues too and I wouldn't recommend them for a first-time duck owner.