I recommend to start with ur "Q" so u can clear ur lane fast.

With this build udyr will be less tanky but still be able to keep up with other damagers.

because of his passive and his "q" u will have much lifesteal with these items combined.

Ull clear ur lane faster with statikk shiv and be able to push, and when chasing champs with ur 'e' statikk shiv gives a nice boost. early game this can come in handy.

Ravenous hydra is for the damage and lifesteal u can also choose to take a bloodthirster instead but activate it and the enemy becomes weaker since ur fully focused on melee.

Trinity force is overall damage and slow, the passive slow will keep ur enemies in range when u wanna hit an enemy close to u for the team while u run towards an other
champ to stun him. Iff things get too hot under ur feet u can also replace trinity force with frozen mallet.

Last but not least is the infinity edge. Since ur att spd is so high on ur 'q' u will have 50% crit strike with the infinity edge plus the extra damage on crits. u will see their health go down faster and faster.