Yes, for that @BruceFor the poor dog who no longer has his master.
This was discussed with some dog behaviorist guy on the radio. He said dogs are more malleable than people. They can generally adapt to a new human/family in a couple of weeks. Being a trained service dog, it has already likely lived with a breeder family until weaned, a "foster family" to get to training age and possibly with the trainer during training. So GHWB was likely it's 3rd and possibly 4th "human".For the poor dog who no longer has his master.