Also, while I am a Vegetarian, also just want to place it here that for spiritual progress - food is just one factor. As bad are the claims that vegetarians are ungrounded, unhealthy etc., so are claims that meat eaters cannot progress spiritually etc. Most of my Daoist teachers eat meat (not much prok though) because their practices require them to eat meat as they utilize some basal energies as fuel for transformation. Even in Tantric practices, we use meat, liquor, sexual practices etc. to whip up an alchemical awakening of super consciousness. In some such practices, as a replacement for meat, we use black lentil, ginger, radish etc. I guess, in a long winded way what I am saying is - everything can be used skillfully to make progress if one so desires…