Yes, we have a 4-1/2 month old Chocolate Lab (got him when he was 9 weeks). Per the vet, puppies just can't physically "get" potty training until about 6 months of age. We've had Hershey neutered already (he was getting aggressive with the cat). This week (bordering on 5 months old) he seems to be very good. We have, however, started obedience training, and they had some tips for potty training, like "tie stations" in every room of the house to restrict his moving around to a doggie bed with some toys. Usually dogs won't make a mess where they lie down. Seems to be working. You would just use the "tie station" when you can't watch him closely every minute. The tie stations in every room where you are keep him "connected" to you.