The eyes would be dull. It would appear to be depressed. The day was shaping up to be a bummer. When I walk away from a dog in the pound I think about it for days. Golden Retriever Rescue is not concerned about pedigrees.
Retrievers come in a wide range of color and size.
However, the dog must have a good temperament. Most scruffy dogs clean up very nicely with proper care and nutrition. I always try to look beyond the cosmetic aspects. This can be difficult on some dogs, especially older dogs. Our meeting was courteous and businesslike.