Revealing mistake: Nearly at the end, the scientists find Alice's body at the waterfall, one of the men lifts up the cloth to take a look at her face. Her face is badly burned on one side and she is pronounced dead. However, take a look at the left side of her neck, you can see her either gulp or take in a quick breath of air. (01:19:05)
Revealing mistake: At the beginning, when one of the black trucks has an accident, whatever is making the dramatic sparks is still running when that part of bodywork is off the ground. (00:05:25)
Revealing mistake: When Alice fixes her broken finger, you can see that the finger (and the entire hand) is made of rubber. This is even more obvious on the Blu-ray.
Revealing mistake: In the early aerial shots of Raccoon City, look to the left of the screen and you can see the CN Tower, a very recognizable landmark that is definitely in Toronto, not Raccoon City. This is due to the fact that film was shot in Canada. (00:05:25)
Revealing mistake: Near the end of the film when the zombies are shuffling up what looks like a parking ramp towards the escape helicopter, in several shots it's painfully obvious that some zombies don't have any makeup at all and a good portion are walking normally, unlike their shuffling comrades. One with blonde hair is even using a handrail. (01:15:20)
Revealing mistake: Resident Evil Apocalypse was shot in Toronto and the filmmakers wanted to use the city surrounding the CN tower to be Raccoon City. They edited out the CN tower, however they missed a brief glimpse at it. It's shown really quickly in between when Angie's vehicle crashes and when it stops. (00:05:25)
Revealing mistake: When Yuri gets bitten while the SWAT team, along with the local PD, fight the zombies on the streets, Carlos and Yuri almost get bitten by a zombie, but they are saved by their 3rd member. Right after that we see a sign reading "Pizza Pizza" which is the largest pizza company in Ontario, Canada. There are no locations in the US.
Answer: First, the T-virus affects humans and dogs differently - zombie dogs look like they've been skinned, but zombie humans just look dead. Second, there's little evidence that human senses have been dimmed, it's just that zombies are stupider without higher brain functions (explained in the first movie) and are slower because they conserve energy for actual attacks, not moving. Dogs are much more efficient predators than humans and don't need to slow down as much because a few bites will take down prey.
Phoenix