They don't- only zombies do in Nacht der Untoten (night of the undead)
You may be thinking of kino de toten on black ops though- in which case there is. It has beware of the six on one of the walls I believe, and that's indicating that they come every six rounds, which they do. I played kino de toten and got to round 22 and they came on the sixth, twelfth and 18th round (every six rounds).
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.
6.2 - 6.5 is normal PH level for dogs,
Most dogs come from Europe or Asia
where do most pure breeds dogs come from
dogs are in the canine order.
Both dogs and ants are of the Kingdom Animalia. Ants, however diverge at the phylum level and become Arthropoda, while dogs become Chordata.
dogs are descended from Pariah Dogs, a primitive form of feral dog.
well they come from the wolf
I think Dogs come from Wolves.
God created everything, including dogs.
The state dogs come from is unknown. No one cares if dogs came from New Jersey or Mississippi. GEEZ, WHY WOULD YOU EVEN LOOK THIS UP?!?!?!?!?!?!?!
they come from large "farms," so to speak, of dogs who are bred continuously until death.