We learned this, especially my grandson, the hard way. We had the stroller parked outside at Epcot and when we went back to get it there was a squirrel in the stroller bottom next to us as well as one in ours. There was no food in ours but my grandson was standing next to the stroller eating goldfish crackers. He dropped one, went to pick it up and the squirrel jumped out of the basket and went for the cracker- biting my grandson in the process.
It was a long walk from Soarin' over to the first aid office.
There are definitely squirrels and they bite!