Wolf diet during the summer is highly variable and constantly changing. See it for yourself! This animation shows the diet of a single pack at weekly time intervals from June 24-October 10 (15 weeks) in 2015. This was the first time pack diet has been studied at weekly time intervals during the summer. What this showed was how quickly wolves can respond to new foods. Once berries came available there was a huge change in the diets of the pack. Similarly, we see black bear showing up in the diet