The chain will break only if you move out of the area, as in if you are on route 118, then go to route 123, then the chain will break, not if you move out of the grass.
To move a sleeping cat, I find that slipping both hands underneath and spreading them to keep the cat in as close to the same position as possible usually works....
You calculate the amount of speeds on your bike (cogs * chain rings) and then look up "_speed chain." I recommend going with a reputable brand, such as KMC.
Have your cow checked out by a veterinarian to determine whether it actually is laminitis or something else like foot-rot, a corm in the hoof, a leg injury, etc. The...