Where are my cows????

Prelude:
We have a tobacco barn on a hill behind our house. Hunter says that it's his barn. He always tells me that he has cows and chickens up there. I have no idea where he came up with this. Our neighbor has a cow lot at the bottom of our drive. Apparently Hunter thinks those are his cows too. The lot is empty now. The cows have been sold at the market. Thursday he asked grandpa for money to shop for a plastic trumpet. He went shopping with his mom and bought his trumpet then brought it to my house and spent the night. He played with it all evening. Serenading us with his "Beautiful Moosic".
Friday morning going down the driveway on the way to work I was still being serenaded with the new trumpet. This is our conversation:
Hunter: Mamaw where are all my cows????
Mamaw: Well, I'm not sure where they are. (Not wanting to shatter his world by saying they had been taken to the market.)
Hunter: They's all gone!
Mamaw: Well, where do you think they are?
Hunter: Them's went to school.
Mamaw: Oh they did?
Hunter: Yes, them's have a teacher.
Mamaw: Oh and what does she teach them?
Hunter: Moosic.
Mamaw: Laughing hysterically, because he has no idea how funny this really is!!