Related על ביצה 3:1

Vivariums for game or poultry - one is not allowed to take care of them on a holiday and give them food; but one may catch game or fowl and imprison and give them food. R. Shimon b. Gamliel says: Not all vivariums are created equal. This is the rule: Anything requiring additional capture is forbidden; anything that does not require additional capture is permitted. One may slaughter animals from cages, but not from nets and not from fishnets. R. Shimon b. Elazar says: Set his net if he comes up on the eve of the holiday and comes on the holiday and finds it damaged, behold, it is permissible for him; it is clear that the animal was caught the day before the holiday. If he comes and finds it as it was, it is forbidden to him; it is obvious that the animal was caught on the holiday.