A process and apparatus for restraining an animal involves urging a spool containing a flexible tension link connectable to the animal, to retract the flexible tension link into a housing. Movement of the spool in a direction associated with retraction disengages a brake urged into braking engagement with the spool, and causes the brake to engage with a lock to lock the brake in an disengaged position. The flexible tension link may be dispensed from the spool while the brake is in the disengaged position. A spool-operated actuator is operably configured to release the lock to permit the brake to engage the spool to stop dispensing the flexible tension link when a selected one of a plurality of discrete pre-determined lengths of flexible tension link has been dispensed. The apparatus may be pivotably mounted on an anchor to restrain the animal from moving any farther than a predefined radius from said anchor.