This little guy here might be a bit older than the ones you are looking at, but is under or just approaching 2 months.(pardon if its not the best example
)
You'll notice the larger comb, and some saddles beginning to come through.
With younger ones, you'll have to really push back the current back feathers to look through and see if you can spot them.
I should note, this little guy here is an easter egger, and The father is a freedom ranger. He grew incredibly fast. Ameracaunas are probably far from similar x_x I sort of want to retract this. The little ones you posted do indeed look a bit too young for saddles. It wouldnt hurt to double check

You'll notice the larger comb, and some saddles beginning to come through.
With younger ones, you'll have to really push back the current back feathers to look through and see if you can spot them.
I should note, this little guy here is an easter egger, and The father is a freedom ranger. He grew incredibly fast. Ameracaunas are probably far from similar x_x I sort of want to retract this. The little ones you posted do indeed look a bit too young for saddles. It wouldnt hurt to double check