When/where do I start checking for eggs?

first lock them up in the coop for couple of days. feed n water them in the coop. i start get a egg from my leghorn around 16 weeks after i put her in the nest box. i dont known about the other breed
laura

 

I would agree with the previous post. Also I would suggest adding a few fake eggs (we used golf balls) to the nesting boxes.

 

When they are getting ready to start laying, their combs and wattles will get redder. You may also notice they squat when you go to pet their backs. They look for a comfy, secluded space to lay so I would look under and behind things for nests. At 3 months they are young yet, you should have have over a month to go, but look for the signs because every pullet is different.