you should definitely call, and if you're afriad for Guiness be sure to inspect your yard and supervise his visits outside. It sounds like they have just forgotten to take care of their dogs, and probably wouldn't care much if they were siezed. The chow might also be starving, but it could be hard to tell through all of the matted fur I'm really sorry you have to see such horrible neglect around you, and I feel so sorry for those pups..