So thats my First try to give you on of my Builds, this on is my Tanky Udyr Build what i think, works great.
First to say with this Build Udyr is a Laner, not a Jungel.
Your main Skill is Turtle Stance, with the DC you can cast the Shield as often as you can in a fight with your team, and be sure your the one who stands as last.
But also you can take with this Build, fast the Towers Down, to make Backdooring.

I hope you will leave comments back ^^ and dont be so hard, its my first try here.