I've been thinking about a mounted Druud recently, and I was disappointed to see that there's currently no way to give an unconventional mount the Mount trait. So I came up with one by adding a little to the Cavalier archetype
Exotic Mount
Feat 4
Your animal companion gains the Mount trait if it does not already have it.
And in the dedication feat, a new clause:
If you have an animal companion from another source, you may instead gain the Exotic Mount feat for free as soon as you qualify for it.
