Professional worrywarts now come in all ages:
The Denver City council is holding a public hearing Monday on a ballot measure that could prevent the circus from coming to the city.
If approved by voters, the measure would ban the display of exotic animals including lions, tigers and bears.
A 15-year-old girl who started a group called Youth Opposed to Animal Acts collected enough signatures to get the measure on the ballot this year.
She must not have gotten that pony for Christmas.