BREAKING DOWN 'Unintentional Tort'. In certain cases, a person causing an accident may be held legally responsible for their negligence and may have to pay a plaintiff for physical injuries, property damage and/or financial loss.
Straw is normally used for a bedding material, while hay is used as a feed supplement. Straw is dried out and works well for building nests and providing cushioning for animals to sleep in. It is not moist like hay and is unlikely to mold.
When we were making clover hay, it ran about 40 pounds for a fully-dry small bale, and over 75 pounds for a newly-baled large bale. I'm told alfalfa hay weighs more. Timothy hay, which is what bunny lovers feed their wabbits, would weigh less.