Wow. He's only four??? In my long experience, they grow for many many years. I'd say he'll continue to grow for at least 4 more years and then slow down, but not completely stop. Quick! Call the Guiness Book of World Records!! Bred by Dokais, reared by Rosebuds, cheered on by Chuckwalla Forum fans everywhere. Hey Tom, where are you? Don't you want to "weigh in" on this??? LOL