That's good, keep treating them. Make sure they're healthy treats though because healthier treats will give them better health which means less stress and when they have less stress they lay the eggs easier:)
It sounds like they are showing signs that they will lay soon:) When you go out near them do any of them ever squat like they're trying to get you to jump on their back? Are any of their combs looking redder than the others?
I posted on on backyardchickens, signs that your chickens will lay...
Here is a close up video I did on my Barred Rock laying an egg! I think the video came out really good:) Makes me feel bad for chickens because they have to do this just about everyday!