I called the store, and the girl I talked to gave me some info: This female Chow was there before this lady started working at the store over 4 years ago and she's had 6 litters of pups! She said there's no way anyone will be able to catch her. She said she's fed her, and the dog will only get close enough to get the food then takes off. If I can find a Chow rescue group in the area, I'll contact them. They may be able to trap her somehow.