The Link with your animal companion allows the druid to handle her animal as a free action.Klaus said:I see no problem with the feat whatsoever. The character still needs to spend move actions to direct who the deynonichus attacks.
I always purchase barding for animal companions ASAP.Klaus said:The deinonychus is still a Large creature, and will have trouble squeezing into dungeons. It still has a very low AC for the current level of play (a Fighter 11 will have an AC in the mid-20s, whereas the deinonychus will have what, 18?).
The deinonychus will be a paper tiger: it can deal good damage (but keep in mind that without greater magic fang or animal growth, its natural weapons won't bypass DR x/magic), but it is far too easy to hit, leading to Power Attacking, leading to more damage, leading to those extra HD lasting all of one round.
And Deinonychus is now a medium creature as per MM errata.
Mike