>>609531
First two questions, whether he was vegan or heated meat eaters, no.
Is it a sin? I think this is primarily an issue of conscience. As St. Paul tells us, things like days, dietary restrictions, "let everyone be convinced in his own mind," and also not judging others for trivial things. Also keep in mind to call nothing unclean that God has made clean as shown to St. Peter. But there are a few things to consider, listed in what in what I judge as most important for Christians in mass.
1) If your body is a temple of the Holy Spirit, owned by God and gifted to you, ought you not to take care of it the best you can? Exercise (as able) and eating as healthy as you are able seems like it would be something Christians should do. If you don't consider veganism or vegetarianism healthy (there is a lot of debate over it), you probably know what is healthier for you in this moment. Don't buy the candy, buy an apple, etc. This should in my view be what all Christians do. Leaner meats, everyone mostly knows what they should be doing better in this area.
2) Meat, is it a luxury if you don't need it? Would it not be better to give to others with what you spend there?
3) Compassion for God's creation, considering we were made to be vegans in an unfallen state, and that we do not need meat now at all, and in the future (New Earth) won't ever need it again.
Depends on your opinions, the Bible doesn't forbid it, and doesn't encourage any particular diet (for Christians).