This video from the USA says about itself:
14 November 2016
Mother Gray Squirrel is introducing her two young boys to Backyard society. Born in July they are now (early November) being weaned off their mother’s milk but they still try and drink constantly, but mom is having nothing to do with it now. They stick together as a family unit for perhaps a few more weeks as she shows them the Backyard ropes and she is constantly wagging her tail and trying to discipline them. Play fighting and chasing are very important to their physical development and survival on their own.