Source: Races of the Dragon
Your draconic nature gives you special insight into training dragons and draconic creatures.
Prerequisite: Dragonblood subtype, Handle Animal 4 ranks, Speak language (Draconic).
Benefit: You can use your Handle Animal skill to handle and train dragons with Intelligence scores of 6 or lower as if they were animals. You can also handle, train, and rear animals with the draconic template as if they were animals (rather than magical beasts). Even with this feat, dragons can't be reared with the Handle Animal skill. (For information on rearing dragons, see page 13 of Draconomicon)
Normal: Without this feat, only animals and magical beasts with Intelligence scores of 1 or 2 can be handled and trained with the Handle Animal skill, and using Handle Animal on a magical beast is done with a -4 penalty on the check.