Horses, in general, do not mature until the age of five, six, seven. Per Dr. Deb's article, scruffy range ponies (like our Icelandics), actually mature *earlier* than other breeds!
That's not to say you should ride them or over work youngsters! More on fusion and maturity: http://iceryder.net/fusion.html Please feel free to forward. Judy http://icehorses.net http://clickryder.com
