Q: Is it permissible for Buddhists to eat meat?
HH: Some Buddhist texts say that it is not permissible to eat any meat, but others, including the Abhidharma-Kosa, say it is permissible to eat meat on the condition that the animal was not slaughtered specifically for the person who eats it.
The best thing is to give up meat entirely. Tibetan monasteries and nunneries in south India became entirely vegetarian 15 years ago. Festivals and ceremonies in all Tibetan monasteries and nunneries should be completely vegetarian. When I was in Tibet, aged 13 or 14, my government officially banned meat from religious festivals and ceremonies.