Greyhound is usually great......however...... I know of a few instances where Jets that were shipped were hung up for a few days at a bus terminal if the driver doesn't feel like putting on the bus, so to ship to KY jets would be no problem if you send it early enough...sending from KY to Montana.... they may not arrive in time!
I asked a manager at Greyhound about the policy and he told me that freight is low a priority.

Just food for thought