chocobo rating question

[Krindor]

A grade 2 chocobo starts at 15, but he also gains around 40% more rating/stats per level at 2 star, once I get my chocobo to 40 again and can get a grade 3 chocobo I'll see what it gives but from my guessing a chocobo gets 40% more stats per pedigree meaning that a grade 9 would get 5 times as high rating, so a rank 50 grade 9 would have a rating of 200, I'm not entirely sure but I believe food still increases rating but you need quite a bit to increase it.