How can you know about that if you don't buy the game?.Those hordes are awesome, really awesome.Learn to look around, don't just hit that tree for hours, without looking back... Also, learn to reduce your difficulty before complaining.Dogs are one hit in low difficulties .Those early dog packs need to go. I can assure you, a lot of people who have interest in this game do not buy it due to such a cheap and stupid "challenges". At least the people i know. Especially as you can´t hear them until it´s too late most of the time.
Finally put early dogpacks for higher difficulty only. Can´t be that hard.