What's with the Cows?

Jake talks in his sleep. A lot. And so clearly that you would think he was awake but for the closed eyes.
Ask Jake what he was dreaming about and he will answer "I dreamin 'bout cows." You can ask him this right now or even tomorrow and the answer will be the same, "I dreamin 'bout cows". That is, except for this morning when he added new members. Some chickens and a pig.

So now when we ask Jake what he was dreaming about he answers, " I dreamin 'bout cows. And chickens. And a PIG!"