My chickens were the same way from just 2 day old. I have 3 different breeds in my flock and each has a different comfort/tolerance level to being picked up or held. Some will let you pick them up if they feel like it, others won't get close enough to give you the chance. Treats definitely bring them running to your feet though. Talking to them so they know your voice and getting down at their level are two big keys to getting them more comfortable with you. More comfortable may not mean willing to play with you like a puppy would.
The one thing I found that works as far as doing a health and safety inspection on the flock is to go in the coop at night while they are on the roosting bars. I go every night to close the coop and do a head count. After dark, mine let me pick them up off the roosting bar and check their feet, between feathers, etc for general health and wellness. I have one of those flashlights that's on a headband so I can put it on my head. It shines where I'm looking and keeps my hands free. I talk to the chickens like I do when I'm feeding them and it keeps them calm while I check them out. I don't know if its because they can't see in the dark so they rather be held instead of flapping, squawking and running off into the night, but it works for me.