I have two speckled sussex the same age, I have two Rhode Island Reds. All the chickens are close to the same age around 22 weeks . One speckled sussex started laying two weeks ago the other one is bigger and fatter but her face and comb are not bright red yet. The Rhodies faces and combs are bright red but still not laying .. I only have one little lady paying rent so far. 2 days ago we butchered one RI because she was eating the eggs from the sussex and raiding the nests and tearing them up looking for eggs to eat.. my sussex decided not to lay in the nest anymore but on the ground, which didn't help because the Red would attack it as soon as she laid her egg. tried the golf ball thing didn't work, tried the egg shell filled with hot sauce didn't work .. but the chopping block worked. Now my little hen is laying eggs every day happily in her nest again. If you don't get the egg eater quickly, soon they will all be eating eggs.