My cows are stuck in my household inventory.

There is no way of getting them out. I tried everything I could think of. Tried buying new animals, a llama appeared and works fine, another cow got stuck also. I put the sed on my household inventory prior to moving house. When I placed the shed on the new home I tried assinging the cow to the shed. When you hover the mouse over the shed it says it´s occupied, but the cow won´t come out. No zzzzs appeared. I don´t know what to do! How do I get them out?