Pretty easy. stay upstairs until level 4 or 5 and open the STAIRS NOT THE DOOR. it will be much easier to defend this way. around level 5-8 the hell hounds will arrive. you can tell when a new round starts and it gets foggy and hazy looking. your character should also say something relating to this. get in the corner to the (left?) of the mystery box and have your entire team back there. the key to surviving is sticking together. if you dont have a heavy machine gun, then just spray with all youve got. when you see blue lightning balls, thats where the dogs are respawning so i suggest throwing grenades in that area. OH, also, the dogs who are on FIRE you can knife and its one hit, but the dogs who arent take like, 4 knifes.
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dog friendly accommodation