I'm not sure. I went pescetarian when I was 16, didn't go vegetarian until I was almost 20, and started inching toward vegan much later. My parents knew I'd always cared a lot about animals (well, mostly warm-blooded animals at the time), and it wasn't a shock to them. I always liked the taste of meat too- as well as pretty much all other foods of animal origin.
I guess the main issues would be:
1) how much you know about nutrition: generally everyone can be vegan, even those who aren't adults, but it's generally not a good idea to just drop all non-vegan foods and continue eating more of whatever else you were eating); and
2) why you want to do this. As I mentioned above, my parents knew how I felt about animals, and could easily accept that my desire to do this was genuine. I don't know if it will confuse your Dad that you've always liked the taste of meat. Lots of us have to avoid foods we like for one reason or another, at least at certain times- we might have religious dietary restrictions, food allergies, medical conditions which limit our diet...
Peasant (1963-1972) and Fluffy (1970s?-1982- I think of you as 'Ambrose' now)- Your spirits outshone some humans I have known. Be happy forever.
Last edited by Tom; 03-30-2019 at 10:09 AM.