Meat dog is saying that they won't cut it as a field trial/hunt test dog. They may not be able to run 150 yard triple retrieves or 200 yard blind retrieves, but they would make a great dog to pick up birds and run the occasional blind retrieve.

Go to a field trial or hunt test and watch some of the finished dogs work. It is amazing what people can do with a dog. It also takes countless hours and repetitions to get a dog to that level, and not every dog will have the natural skills to start with. That is why you pay for good bred dogs, instead of a yard screwing down the road.