It's a personal choice. I did because my children are going to eat those eggs. My chickens are healthy but I did it at 16 weeks just in case. Many folks don't do it and I was on the fine about it. Only real downside is not eating the eggs for two weeks after. It's cheap and easy, just two ounces...
Layer feed is fine. Yes you can eat the eggs but they are small. I can't eat my first ones because I had just wormed them thinking I had a few weeks till they layed.
I think what you are seeing is normal. My RSL started last Wednesday at 16-17 weeks old. First day I got 1, none the next day. Day three I got 2. None on day four. One on day 5 and six. And now today I got 2 again. Out of 6 pullets I think I have 2 that are laying. Mine are small to medium with...