When you switch your pet’s diet to BARF (all natural raw food diet), changes occur. Some are immediate, others take time. The first change you’ll see is a new zest for life. Young and active dogs show a remarkable increase in stamina and energy. Older - and even arthritic dogs - take a renewed interest in life, want to go walks again, play ball and join in family activities. Cats become more active and mobile too, but in more subtle ways.