Udyr vs Cho'Gath

Swap stances every two autos: after each spell, Bridge Between (passive) gives attack speed to your next two attacks.

Switch to Iron Mantle (W) when you're taking damage: you gain a shield, and your next two autos heal you. Once awakened, it also heals you over time.

In Blazing Stampede (E), each auto makes you dash to your target and stuns them. Switch targets to stun several: the same target can't be stunned again for a while.

To engage into a team full of CC, awaken Blazing Stampede (E) by recasting it: you become immune to immobilizing effects and gain move speed.

Cast Wingborne Storm (R) while running at the enemies: every second, it damages and slows everyone around you.

Keep moving against him: Rupture (Q) strikes an area on the ground, and an enemy standing still takes a knock-up, damage and a slow.

Punish him when he goes for last hits: Carnivore (passive) restores health and mana for each unit he kills, and he lasts a long time in lane if you let him farm.

If you have range, keep your distance: his kit has no dash, only the slows from Rupture (Q) and Vorpal Spikes (E).

Don't stay in melee range at low health when Feast (R) is up: its true damage ignores your resistances, even if you're a tank.