How much exercise does a Border Collie need per day?

Exercise needs vary by age. Border Collies of 3-6 months have underdeveloped bones, so keep daily exercise to about 30 minutes; at 7-12 months they need about 40 minutes; adults can handle 1-2 hours; seniors with declining function need only 20-30 minutes. Adjust to the individual dog’s condition, reducing activity if it is frail.