Looks like a Buff Orpington! That looks just like my babies
People have been telling me mine look like two roo's and a hen and she has a light pink comb the other two are more pronounced and definately redder. I'll wait for more pics from you!
Looks younger than 7 weeks, my girls by that age where much more feathered in and Yes it looks to be a pullet, the roos comb would be much more developed if it were 7 weeks.