The dog fox, and in some cases non-breeding ‘helper’ vixens (see: Behaviour and Sociality), will hunt for food to sustain the vixen and the cubs until the cubs are sufficiently independent to be left for longer periods (around six weeks old); the vixen will then resume hunting for herself and the cubs. That said, there appears to be some disparity between the behaviour of the dog fox in different regions and this has led several authors to consider that dog foxes are rather disinterested fathers. Roger Burrows in his book, Wild Fox, for example, saw no evidence that the dogs paid any interest