Max has everything he needs: a comfortable home, a loving family, and a loyal pack of friends ... But Max is a 7-year-old Labrador retriever. Watch Canis familiaris (6/6) 12 min Watch the programme ...

It is the largest extant member of its family, with males averaging 43–45 kg (95–99 lb), and females 36–38.5 kg (79–85 lb). Like the red wolf, it is distinguished from other Canis species ...