We have consistently had a short drawer at my place of work. Sometimes five dollars, once as much as twenty-five. The boss doesn't know if someone is counting back change wrong, or if money is being stolen from the drawer.

Now, she is saying that if the drawer is more than ten dollars short on any day, that she's docking it from the paychecks of everyone that worked that day!!

I'm pretty sure this would be considered stealing from us, right?

This is possibly legal under federal law. The feds would consider this to be a legal deduction as long as minimum wage and overtime was paid.
http://www.dol.gov/esa/whd/regs/compliance/whdfs16.pdf

States can have rules more favorable to the employee. Your state is not my state and I have no idea what rules (if any) that your state has. Perhaps another responder does.