My shephard/chow mix dog has been getting progressively skinnier over the past few months. She seems to be eating but has also had runny stools and accidents in the house. Is this normal? She is around 10 or 11 and has always snacked on her food but was in a house that gave her many table scraps. Is changing her food a good idea?

Most dogs will thrive on most chows. Likely she is sick. For more details, see the sticky at https://www.askmehelpdesk.com/dogs/information-articles-our-dogs-expert-labman-53153.html#post254171