Welcome! It would help tremendously to know how old your chickens are and what kind they are. Some varieties can lay as early as 17 weeks (all of my Red Sex Links have done this) and some don't even think about it until they are 6+ months old. And within that span, you need to take into consideration that, like people, they are all different as individuals, so there is no hard and fast "date on the calendar" to expect your first eggs from them.
I trust you are feeding a good quality food in addition to the treats. As the others have said, treats should always be just that - occasional snacks or training aids. Those treats come in mighty handy when trying to round them up to go back into the coop for the night or to teach them to use ramps up into the coop, etc. I don't want to sound judgmental, but often when I hear the words, "I feed them twice a day" what it ends up being is tossing some scratch in for them and calling it good. Scratch is not food. I'm going on the assumption that you are feeding them the correct food for their ages. They need a clean container that holds enough food for the entire day so they can feed when the urge hits instead of waiting for it. They should be able to wake up first thing in the morning and have food and water right there. I told my grandkids when they first started helping me with the chickens, "If you want breakfast from them, they need breakfast from you."
Let us know how old your little ones are and what you are actually feeding, and we'll be so much better able to help answer your questions. Welcome to the wild wacky world of chicken keeping! It's a roller coaster I wouldn't have missed for the world!
! Actually, it's best to feed your birds free choice, meaning you always keep food available to them. They won't overeat. Water should also always be available - I'm not sure if you meant you change their water twice a day or you're only providing water twice a day, but if it's the latter, you definitely need to have a water source available to them at all times.
