A recent study by UC Davis has found that gray wolves in California are relying heavily on cattle for food. The study analyzed wolf scat samples from the Lassen and Harvey packs during the summers of 2022 and 2023 and found that cattle DNA was present in 72% of the samples. This reliance on cattle is attributed to the scarcity of natural prey options in the state, particularly mule deer, which have declined significantly since the 1970s.