JENNY - A female ass. J09901. Definition from Hurnik et al., 1995.
JERKING, HEAD - See Head Jerking. J09902. Definition from Hurnik et al., 1995.
JIBBLING (horse) - To balk at or defer a required action. J09903. Definition from Hurnik et al., 1995.
JOINTS, HYPERMOBILITY - See Hypermobility of Joints. J09904. Definition from Hurnik et al., 1995.
JUMP - To spring from the ground or surface with the propulsive force being derived primarily from the action of the legs. J09905. Definition from Hurnik et al., 1995.
JUMPER (horse) - A horse trained, exhibited, or competing in jumping events. Jumpers are judged according to faults, such as knock-downs, touches, falls, refusals, run-outs, loss of gait or circling, and time penalties. J09906. Definition from Hurnik et al., 1995.
JUVENILE TEAT SUCKING - Habitual teat sucking occurring among juvenile, group-housed animals. Juvenile teat sucking can cause inflammation, abscesses, or stricture of the teat canals and subsequent inability to eject milk after parturition. J09910. Definition from Hurnik et al., 1995.