Shabkar:

The great lama Jamyang Gyamtso said,

All phenomena arise in interdependence. Owing to the causal link that exists between the meat eaters and the animal killers, the meat eaters themselves constitute a cause and pretext for the evil act of killing. As a consequence, the karmic result of slaughtering a cow, for instance, will ripen on both the meat eater and the animal killer. The only difference consists in the extent of the effects. This is an inescapable fact. The reason for this, the Kadampas say, is that those who eat meat are perpetrating an act that is similar to killing. As a result of this, the consumption of meat is proscribed in both the Hinayana and the Mahayana. Therefore, let all practitioners abandon meat eating as much as they can.

(Source: FB. p. 78)