The vet suggested that Fred use a breathing equipment to help him recuperate. His new family was desperate to help Fred no matter what it took, but they were unsure how they would convince the enormous dog to wear a contraption and have mist blown into his lungs several times a day.
Surprisingly, Fred seemed to enjoy the treatment. He seems to understand that putting on the mask was in his best interests. And, despite the fact that he was still getting acclimated to living with his new family, he let them help him.