You can probably safely assume he isn't a rescuer. Rescuers know their limits. How could you possibly give 50 dogs the proper care and attention they need? I don't think its possible unless he's a millionaire with a staff to take care of the dogs. Also a rescuer would most likely not move without finding a home for their dogs.

This is disgusting! My heart breaks for the dogs and cats. I pray they will be rehomed safely.