If you're wondering why the wolves weren't given the impossible food challenge at 5 months, the author notes in the comments:
> @K9TrainerTina: they were, actually. however, the 5 month old wolf pups mostly just went to sleep after initially failing to get the food, so they were excluded from the analysis.
> @K9TrainerTina: they were, actually. however, the 5 month old wolf pups mostly just went to sleep after initially failing to get the food, so they were excluded from the analysis.