HELP...21 Month Old PULLING HAIR

All,
My angel of a daughter is pulling hair at her sitters. When I say
pulling hair, I mean chunks of hair are being pulled out. Anyway,
she's 21 months old, extremely affectionate, cuddly, and typically
harmless. However, about 4 months ago, she started pulling hair, has
recently got worse and she only pulls hair from playmates roughly her
own age. The sitter is great, and tries to say "no" and "that hurts
when you do that" and even has tried "time out". Nothing is working and
it's hard for us, because our daughter only does it when she's at the
sitters, so in turn hard for us to correct. Frankly, it's embarressing
and can't hope but wonder if it's something we're doing (or not doing)
that is causing this behavior. Any advice is greatly appreciated.

Welches...

I don't think it's anything you're doing.
Children go through these stages. It sounds like her sitter is doing the
right thing, and she will grow out of it. The only other thing I'd suggest
is asking the sitter if it's any particular time. (like if someone's playing
with a toy she wants). In which case it would be reasonable for the sitter
to try and find a way of avoiding the situation.
I'll also add that at that age both my children had hair that came out very
easily, so she may not be pulling as hard as you think :-)
If she's not doing it for you, then all you can really do is ask the sitter
to keep you updated, and be consistant with her if she does it at home.
Debbie

Worried First Time DAD.