Cattle are definitely a capital investment and they can be depreciated based on the MACRES depreciation schedules provided by the IRS.
Of course, if you raise your own breeding stock and don't capitalize the cost, you can't depreciate them.
If you have a lot of cattle and don't keep detailed records, death losses and burned out cows are not easy to reconcile to cost records. I had a long discussion over this with the IRS and finally, they just kind of went away.
What the advisor is probably trying to tell you is that you can have a land exchange between DE and MO, but that it applies to real eastate only, not to livestock and equipment. You can trade cattle for like kind (angus for charlais, for example) without any tax consequences. But if you sell the cattle and take the money, it becomes taxable.
Your accountant should know this or he doesn't know much about the agriculture business and the applicable provisions of the Revenue code