Secondly, the answer is: a wagon-full. Sheep are not particularly more dense than grain. You are not going to be able to cram a higher mass of sheep in a wagon than you can cram grain; the exact number you could transport in a particular wagon will be determined more by geometry than mass.
This does tend towards a common mass-unit for anything that is shipped by mass; in archaic American/English units this is typically the hundredweight and ton, depending on whether you are shipping a little or a lot.
A more likely example would be shipping grain or coke one way and shipping iron stock back; you might transport 15 hundredweight each way, although more likely you'd be light one way or the other.
Secondly, the answer is: a wagon-full. Sheep are not particularly more dense than grain. You are not going to be able to cram a higher mass of sheep in a wagon than you can cram grain; the exact number you could transport in a particular wagon will be determined more by geometry than mass.
This does tend towards a common mass-unit for anything that is shipped by mass; in archaic American/English units this is typically the hundredweight and ton, depending on whether you are shipping a little or a lot.
A more likely example would be shipping grain or coke one way and shipping iron stock back; you might transport 15 hundredweight each way, although more likely you'd be light one way or the other.