In WolfQuest AE, there are Competitors.
They're separeted in different categories.
Some of they can kill your pups, some cannot.
Large Competitors
(Can Kill your pups)
Grizzly Bears: Cubs, Sows and Boars
Cougars: Males and Females, Adults only
Medium Competitors:
(Can kill your pups)
Rival Wolves: Males and Females, Adults only
Dogs: Males and Females, Adults only (Lost River DLC)
Golden Eagle: Adults only
Bald Eagle: Adults only
Small Competitors:
(Only coyotes can kill your pups)
Coyotes: Males and Females, Adults only
Foxes: Adults only
Crows: Adults only