Talenta Dinosaur Bond( Player's Guide to Eberron, p. 75)
You have undergone grueling training on dinosaur back and are skilled in the halfling techniques of fighting while mounted.
Choose a particular dinosaur mount that you are familiar with. You gain a +4 insight bonus on Ride checks made in conjunction with that mount. In addition, as long as you are mounted on that creature, both you and your mount gain a +1 insight bonus to AC and on Reflex saves.
If your mount is killed, you can apply this feat to a new mount after seven days have passed.