arm&hammerSorry, this opportunity has ended but find more current ways to Donate4Free at Freebies 4 Mom. Join Arm & Hammer in its quest to donate cat litter to a local shelter. For every Like on Facebook Arm & Hammer will donate 2 lbs. of cat litter to a local shelter. Help them reach their goal of 100,000 lbs. by 7/15/12.