Breeding females will blow coat after whelping, then regrow the down and blow again later in the spring doubling the workload. Not nearly as much as you would think. Being a low energy dog, and coming from such a remote and food-poor part of the world has combined to produce a very energy efficient dog. Appetites wane during the warmer months and for both genders, if intact, during the breeding season. Increase in appetite occurs during the colder months, especially if the animal spends much time outside.
Dams also develop quite an appetite soon after whelping.
Tibetan Mastiffs can live in warmer climates, but the heat must be dry, and a cool place must be available to them. Hot and humid locales are a very poor choice of environment for a Tibetan Mastiff. Any reasonably sized yard with a tall and strong fence that is tough to dig under will satisfy for a Tibetan Mastiff. Apartment living is not recommended, but acres of land are not necessary either. Additionally, a shorter fence is an invitation to stray and will not contain even a small Tibetan Mastiff.