Bert and his siblings were cold-heartedly abandoned as chicks. The animal lover on whose doorstep they found themselves took care of them and nursed them up. They were allowed to go on a trip to the lake every day and spent many happy hours together. But the older they got, the more the neighbors felt disturbed by them. The animal lover turned to Gut Aiderbichl for help - Bert and his fellow animals became Aiderbichlers!