Generally adult cats will be okay if returned to familiar surroundings after a length of time away, such as the time it takes to wean a litter of kittens. As long as there is still a source of food, water and shelter. Just make sure to inform the caretaker at the site that the cat will be returning and ask the caretaker to inform you if the situation is not working out for the cat. It is fairly common for feral moms to go back after being in care with their kittens, with no issues. But having the caretaker keep an open line of communication can help your peace of mind for those rare situations where there is an issue.
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