hello in many games i use this build when i use warwick ofc... i love this build tbh and i mean its good. :)
.. and is a good build for who want use warwick but dont want do jungle.. :)
GL & HF

Eternal Thirst - Each of Warwick's attacks will heal him for 5/10/15 health. Each successive attack against the same target will restore increasing amounts of health to Warwick.
This is a skill that allows Warwick to jungle from lvl 1 very efficiently.
Simple, you hit a target = you get health, even without lifeseal.

Hungering StrikeHungering Strike - Takes a bite out of enemy unit for damage and heals Warwick.
Strikes an enemy for the greater value between 75/125/175/225/275 (+1) and 8/11/14/17/20% of the target's maximum health (can only do flat damage to monsters), and heals Warwick for 100% of the damage dealt.

Cooldown - 12 seconds
Cost - 100/100/100/100/100 Mana
Range - 400

Take note this is a 400 range skill. It's great for keeping yourself alive, while facing other team carry champ. You maybe have lower damage, lower or 0 lifesteal that time, but with this... he will be down before you are, and he will probably start to run away... worst thing you can do while facing warwick XD. You should use it right after ultimate and to finish off that last fiew points of health.
After maxing out that skill you can use it to get health back after a team fight in the jungle and get back to fight without beeing forced to go to base.

Blood Scent - Warwick passively senses weakened enemy champions around him. The scent of blood sends him into a fury causing him to move at incredible speeds.
Warwick senses enemy champions under 50% life within 1500/2300/3100/3900/4700 distance of him; Upon sensing an enemy at low life he will gain 20/25/30/35/40% Movement Speed.

Cooldown - 45 seconds
Cost - Passive
Range - SELF

Blood Scent is a best ingame skill for catching fleeing enemy champs, as well as running away from a loosing battle (if one of their champs have <50% hp).
This should ALWAYS be picked at lvl 4 and maxed out together with Hungering strike and ulti.
You should be able to get som1 to <50% with your Ulti+HS combo, witch enables Blood Scent and just run and kill. So you can call it a passive movement speed increase :P.
It also reveals any enemy player that you have scented on map even in bushes.
It will enable itself if you have a <50% stealter near you as well. But you will not be able to see them anyway.

Infinite Duress - Warwick lunges at an enemy Champion, stunning them and dealing damage for a few seconds.
Warwick lunges at an enemy Champion, stunning them for 1.7 seconds. While they are stunned, Warwick quickly strikes the target 5 times for 33% of his attack damage plus 40/60/80. Warwick gains an additional 30% lifesteal while performing Infinite Duress.

Cooldown - 90/80/70 seconds
Cost - 100/125/150 Mana
Range - 700

Ghost- increase ur speed movement basicly is for when they ambush u or something is for run from them ...
ignite- you dont need this one. Its often used as a last hitter on running away champ. With your Blood Scent + Hungering strike beeing a ranged atack you dont need this to kill off your opponent.
Teleport - Using this skill will destroy the element of suprise and we dont want that. Its better to run through jungle and get that tower pushing bastard from the back near your tower. If you would start teleporting to the tower or mob, he will run away before you get there anyway.
Exhaust- Its a nice choice because you can slow your target, which makes your chasing a tad bit easier.
Also if your running its nice.

well i usualy use hungering strike then infiniti duress and and after hunters call but u can do like infiniti duress/hunters call and after hungering strike :)

PROS
-Amazing laner, hard to harass.
-Great ganker/chaser
-Ulti is destructive
-Not squishy
-Passive lifesteal
-Great solo
-Sexy Wolfman

CONS
-One of the first that the other team focuses
-Hard to harass
-LOW RANGED :(
-CC destroys you more than most champs (disrupts your ulti, stops your Blood Scent, makes you cry)
-Can run out of mana extremely quickly if left unchecked

While I don't recommend it Warwick can solo lane in a 3v3. It's very difficult because you will usually be against a ranged carry which makes it very hard to harass and last hit minions. You will overlevel and this is the one reason to solo lane. If you can be higher leveled than the majority of their team it makes you even more destructive in team fights. Ganking will be really hard because as soon as your gone the other team will definitely call a mia. If you can get first blood however and harass the other player enough to take lane control your on your way to an easy victory. Just remember: use your lifesteal to stay in lane. It will make the other solo laner frustrated if you keep getting all your health back from their harass. This will eventually make them do something stupid, which will give you a nice kill and lane control. It's hard, but if you can pull it off kudos to you.

This is extremely important. You must always be communicating with your teammates. If you and your teammates have skype or vent I recommend using it. As mentioned Warwick is great at chasing and finishing targets, if your teammates loses a target and needs someone to finish it it really helps for them to tell you where they got away and where to look for them. Also, if their below half health you can switch on your Blood Scent to find them. Also when preparing for ganks you need to be able to have constant communication with your team to give locations of where to come from. Warwick needs to know when to use Infinite Duress and on what targets. You need to be able to have your tanks telling you when their going to use their CC. Without communication you could miss many game changing situations.

If your looking to integrate this build in to 5v5 gameplay I have done it before. Just remember that you should definitely not solo for this. Too much ganking opportunity. For this you should take a lane with one of the champions mentioned above, and try and get as many kills as you can. Team fights in a 5v5 are much different. Rather than a tank, a mage and a physical DPS, your team is composed of much more. You need to know your role. If your not carrying that hard compared to another champ take the hits for him/her. Ganking will be more frequent in a 5v5 because three lanes makes it harder to keep all champions accounted for. There may be a jungler also. I really believe that this build should be solely for 3v3 and you should just jungle for a 5v5, but hey, if you can pull it off why not?

If you think you are skilled then you should really get this champion, it's really fun to play and you never get tired of it.

Hope you enjoyed this guide,
Look forward to hear your opinions,