agister

Historically, agistment has been defined as the "feeding or keeping of sheep, or any kind of cattle." (239) In more recent times, agistment is considered to be a "a type of bailment in which a person, for a fee, allows animals to graze on his or her pasture." (240) An agister, or the holder of the livestock, "assumes full control of the animals' well-being during the term of the contract." (241) This is considered a bailment because the agister is expected to return the animals in the same condition as he received them at the expiration of the contract.

A, [who is] an agister of cattle, kills B's bull, which is in [B's] possession, to prevent a spread of infection which is dangerous to other cattle and to human beings.