Is there zombie dogs after round 25 in cod 5 in zombie mode

Quote-"No there is not but it for some reason to me sounds like it sometimes and i guess its not just me that hears it but i have gotten to round 40 and i never saw a dog in the gigantic horde of zombies that massacred me." This is partly true.Though they don't show up in the "Nacht Der Untoten" or "Zombie Verruckt" maps,Treyarch has made a new map pack that includes the "Shi-No-Numa" zombie map,where "Hellhounds" will spawn randomely in the place of a zombie wave.It can happen on any level in the map.