If the cows are standing, the fish are biting.
If the cows are lying in the pasture, the fish are not biting.
Take a look at the closest cow pasture before you go fishing if you wish to catch the most fish.
Old Trunks thinks if the herd is scattered, that is half standing and half resting on the ground, the fish are scattered.
We talked about this on the way to the lake recently, Tom had learned that laying down cows meant it was going to storm.
There are no cows close to the lake, except Garfield, they must have been standing recently!