[I]n return for shouldering a few extra duties (watchdog, childsitter, sled dog, juvenile circus performer, losthamster retriever, plus the full-time summer job of bear-scare on mushrooming expeditions), he may hunt for his own amusement, without let or hindrance, throughout the year until September 15, or such time as the upland game and wildfowl season opens, when he must immediately put aside all temptation and revert forthwith to his professional capacity of model gundog.
Source: wiktionary