I hate zombie animals, in fact because their brains are so much less complicated than ours, I wouldn't be supprised if one can move as fast or faster even than a healthy human sprinting for their life.
This is why I hate them, they are more dangerous than normal humanoid zombies. In fact, in a zombie outbreak, humanoid zombies are about the least you have to worry about. The real danger is other humans.
Think about it, our strongest weapon is what we are all born with, the human brain. If used right, it can be far superior to virtually any weapon! Zombies can't think, we can, so that is a great advantage for us! What really worries me are the bandits and hijackers that come with the zombie outbreak. They can think and plan too, and at times are quite smart. A ditch will defend you against zombies, but a group of bandits can make a bridge over it and cross. A fence is a major barrier to a zombie, but a bandit can climb over it or cut a hole through it. Bandits are infinetly more dangerous than a humanoid zombie, if they are of the shambling type. If they are runners, well thats a different story all together.
All you really have to do in a zombie outbreak is think carefully and prepare, thats it! You can outhink any zombie, and logic is also on our side. IF they are humanoid, then they only have human senses: sight, hearing, smell, touch and taste. They have limitations like us, excepting pain and exhaustion. If you break its neck, it loses control of its body, shove its nose bone into its brain, it dies like us. There is no "Sixth sense" for zombies, and they can only smell as good as we can.
I think that their main function of detecting us is hearing or sight. Yes, no smell, no sixth sense crap, sight and sound like us. If we sneak behind a zombie without making a sound, they wont know we are there! In the dark, we can sneak past lots of zombies, but remember that they can do the same if your not careful! Knowledge of human limits is what can save us, use it!
But they have advantages against us as well. They dont require food, water, rest or comfort. They have no fear and emotions. And they may have numbers on their side. Sure, one doesn't look all that threatening, but 100? Different story. We panic, freak out and lose concentration. And this can kill us, if we lose our cool, we're dead. Hence why you must remain calm at all times, if you are calm, you can run, focus, attack, aim and defend better. This is the zombies main weapon, phycological attacks. Thier massed moans can freak you out, even though they do this unconsiously!