That ' s not a tip ! <| sep |> I guess I ' m there on round 7 or 8 as well . Often I do the infirmary first , because I ' m not too fussed about opening the cafeteria door really . Anyway , the early docks is the bottleneck point really , everything gets easier after than in my opinion . I try to keep the door underneath the dog closed to make it bit easier , but I assume you do the same . What also helps is that you only need to feed a handful of zombies to the dogs , so you could play in a safe spot and every round when you have only a handful of zombies left , you go feed them . What I sometimes do , is get Juggernog and go back up with the gondola , and then buy you way downstairs all the way from the other side . It takes a little more time before you have the shield , but I guess you ' d rather build it in the cafeteria anyway . Keep in mind that you don ' t need the tomahawk before you go to the bridge anyway