The Bright Eyes Dog Rescue group says it lost up to $600 to $800 in donations after someone emptied two donation boxes.

"I'm just really disappointed. It's upsetting," Jamie Parker, from the group, said. "We work really hard. We're all volunteers."

The group said the containers were in highly visible locations in stores. They checked with staff and management and learned that nothing suspicious had been noticed.

The group has filed a report to police and is also hoping someone may know something.

"We realize it's a long shot, but if anyone knows anything about this theft, please contact us," the group said in a post on Facebook. "While some may think it is just a few coins, it comes down to principle. That money was stolen from a charity."

The charity said it relies on donations to cover a variety of expenses, including veterinary bills and supplies.