During a long period when there is no rainfall a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. this behavior is due to

Dehydration because animals can only live so long with water

being resourceful

Explanation:

because it has no water so it wanders until it finds the pond to drink out of but if that means to leave it's hunting territory then so be it. it could also be it's natural instinct to survive and to tread until it finds what it needs.