I gave in to temptation

Despite promising not to increase my flock until next year I was at an animal park today and couldn't resist 3 particular little chicks. They're supposed to be welsummers but I'm not so sure. What do you think? 2 are 1 week old and the 3rd is bigger and darker colouring.

The bigger darker one deffo looks like a Welsummer chick to me - we've hatched a couple ourselves and they make beautiful birds 

It's hard to tell with them being so young.  I do remember the first lot of Welsummers we hatched (only two so not that great an amount to compare) had the dark v on their head - they both were girls.

The current ones with our broody (again two!) - one does have the darker markings on its head, the other seems lighter and the feathering coming through looks a bit lighter too...

I know girls have quite distinct "eyeliner" when young which helps tell them apart.

Sorry I'm not much help but I'd hate to mislead you!  I'm just going from my somewhat limited experience.

It is a bit naughty on the seller's part (or ignorance) but RIRs are beautiful birds