As kids prepare to put on their favorite costumes and walk door-to-door for trick-or-treating, some may notice teal pumpkins outside houses during their spooky walk around the neighborhood for candy.

HOLYOKE, Mass. (WWLP)—Common allergens could make it tricky for children to go door-to-door on Halloween. Millions of children are expected to trick-or-treat tomorrow. However, many will have to ...