Mark Raycroft / Border Collie (Canis familiaris) five adults sitting in a row

Mark Raycroft / Border Collie (Canis familiaris) herding sheep in pasture

Mark Raycroft / Border Collie (Canis familiaris) adult with three tennis balls in its mouth, waiting to play fetch

Mark Raycroft / Border Collie (Canis familiaris) pair

Mark Raycroft / Border Collie (Canis familiaris) pair resting in autumn leaves

Mark Raycroft / Border Collie (Canis familiaris) resting among autumn leaves

Mark Raycroft / Border Collie (Canis familiaris) resting among autumn leaves

Mark Raycroft / Border Collie (Canis familiaris) resting on stump

Mark Raycroft / Border Collie (Canis familiaris) female

Mark Raycroft / Border Collie (Canis familiaris) female with tulips

Mark Raycroft / Border Collie (Canis familiaris) female

Mark Raycroft / Border Collie (Canis familiaris) trio

Mark Raycroft / Border Collie (Canis familiaris)

Mark Raycroft / Border Collie (Canis familiaris)

Michael Durham / Border Collie and Australian Shepherd (Canis familiaris) mix female at nine weeks on the left and nine months old on the right

Michael Durham / Border Collie and Australian Shepherd (Canis familiaris) mix female at nine weeks on the left and nine months old on the right

Mark Raycroft / Border Collie (Canis familiaris) portrait of six adults

Mark Raycroft / Red Border Collies (Canis familiaris) portrait of three adults

Mark Raycroft / Border Collie (Canis familiaris) sitting on straw bale at a farm with sheep

Mark Raycroft / Border Collie (Canis familiaris) herding sheep in the snow

Mark Raycroft / Border Collie (Canis familiaris) herding sheep in pasture

Mark Raycroft / Border Collie (Canis familiaris) herding sheep in pasture

Mark Raycroft / Border Collie (Canis familiaris) three adults peering through a fence

Mark Raycroft / Border Collie (Canis familiaris) three adults sitting together in the snow

Mark Raycroft / Border Collie (Canis familiaris) two black and white adults sitting together among yellow flowers

Mark Raycroft / Border Collie (Canis familiaris) two adults, one tan and white and the other black and white, sitting together

Mark Raycroft / Border Collie (Canis familiaris) portrait of two black and white adults resting on fallen autumn leaves

Mark Raycroft / Border Collie (Canis familiaris) portrait of two black and white adults sitting in green meadow

Mark Raycroft / Border Collie (Canis familiaris) two black and white adults peering over the top of a fence

Mark Raycroft / Border Collie (Canis familiaris) two black and white adults resting on lawn

Mark Raycroft / Border Collie (Canis familiaris) two black and white adults resting on deck

Mark Raycroft / Border Collie (Canis familiaris) two adults, one brown and white and one black and white, sitting together in the snow

Mark Raycroft / Border Collie (Canis familiaris) adult portrait standing in tall grass

Mark Raycroft / Border Collie (Canis familiaris) adult portrait sitting amid wildflowers

Mark Raycroft / Border Collie (Canis familiaris) adult portrait

Mark Raycroft / Border Collie (Canis familiaris) adult portrait laying on lawn

Mark Raycroft / Border Collie (Canis familiaris) adult portrait sitting on lawn

Mark Raycroft / Border Collie (Canis familiaris) adult portrait sitting on lawn

Mark Raycroft / Border Collie (Canis familiaris) portrait laying in grass

Mark Raycroft / Border Collie (Canis familiaris) sitting at front door of house

Mark Raycroft / Border Collie (Canis familiaris) adult sitting in grass, fall

Mark Raycroft / Border Collie (Canis familiaris) two adults, one brown and white and one black and white, sitting together in the snow

Mark Raycroft / Border Collie (Canis familiaris) leaping in the air to catch a frisbee

Mark Raycroft / Border Collie (Canis familiaris) leaping in the air to catch a frisbee

Mark Raycroft / Border Collie (Canis familiaris) adult playing, standing on hind legs

Mark Raycroft / Border Collie (Canis familiaris) two adults leaping over jump

Mark Raycroft / Border Collie (Canis familiaris) adult leaping over jump

Mark Raycroft / Border Collie (Canis familiaris) adult leaping over jump

Mark Raycroft / Border Collie (Canis familiaris) portrait of puppy among garden flowers including Petunias and Marigolds

Mark Raycroft / Border Collie (Canis familiaris) adult resting on lawn next to flowers

Mark Raycroft / Border Collie (Canis familiaris) adult standing alert on rock

Mark Raycroft / Border Collie (Canis familiaris) adult peering over a fence

Mark Raycroft / Border Collie (Canis familiaris) adult laying in grass, fall

Mark Raycroft / Border Collie (Canis familiaris) in mid-stride, fall

Mark Raycroft / Border Collie (Canis familiaris) standing in grass

Mark Raycroft / Border Collie (Canis familiaris) standing in grass

Mark Raycroft / Border Collie (Canis familiaris) laying next to hay bale

Mark Raycroft / Border Collie (Canis familiaris) adult laying on hay bales with pumpkins

Mark Raycroft / Border Collie (Canis familiaris) adult laying on hay bales with pumpkins

Mark Raycroft / Border Collie (Canis familiaris) two adults and two puppies

Mark Raycroft / Border Collie (Canis familiaris) pair

Mark Raycroft / Border Collie (Canis familiaris) resting on patio

Mark Raycroft / Border Collie (Canis familiaris) pair with autumn leaves

Mark Raycroft / Border Collie (Canis familiaris) pair

Mark Raycroft / Border Collie (Canis familiaris)

Mark Raycroft / Border Collie (Canis familiaris) lifting paw while sitting on stump

Mark Raycroft / Border Collie (Canis familiaris) female in play bow

Mark Raycroft / Border Collie (Canis familiaris) in play bow

Mark Raycroft / Border Collie (Canis familiaris) on porch

Mark Raycroft / Border Collie (Canis familiaris) on porch

Mark Raycroft / Border Collie (Canis familiaris) female at barn door

Mark Raycroft / Border Collie (Canis familiaris) adult leaping over jump