I think the affection between him and his master is even better than that between his master and his son. After all, he and his master have lived in Australia for more than 30 years, probably longer than the time between the master and his son.
According to Brian, Maggie was in good health a few months before her death. He often walks from the grazing area to the office and often plays with cats. But just two days before her death, Maggie had physical problems and finally passed away.
Maggie has lived for a long time, and I believe his last wish must be to hope that his master will live a long and healthy life.