I took photos of one of my old sketch books today from 2005 when I was twelve turning thirteen. I have lots of these old sketch books all full of horse drawings. I didn't draw much else because the only reason I drew was because of horses. I always looked forwards to this day when I could look back on my old drawings and see how much I have improved. As you can see I always added the date to my drawings.
I had a whole herd of imaginary horses and knew the colour and temperament of each one.
If I had never loved horses so much I would probably never attempted to become a real artist.