Update: approaching them from the SIDE has made a huge difference! For the first time since I've had them, I just had all 3 sitting on my hand & wrist picking away at chick feed I put there for them! Once they're old enough to start feeding real treats, rather than just what they have in...
If you don't mind my asking, what did you do to your brooder? Mine is a plastic bin w/ clear sides so that they can see me coming, and I always announce myself, but I think you may be right about the brooder lid!
Would welcome any tips on helping my chickies be less scared of me. I do pick them up and hold them gently 2-3 times a day until they stop struggling, but they still wig out every time the lid comes off their brooder.
Unfortunately I suspect the answer is going to be "spend more time with...