Ernie Janes / Jack russell terrier in wheelbarrow with apples, UK

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, wearing a party hat.

Petra Wegner / Jack Russell Terrier, puppy bitch, 4 month, sitting with back legs splayed

Jane Burton / Jack Russell Terrier puppy

Mark Raycroft / Jack Russell or Parson Terrier (Canis familiaris) adult jumping through agility tire

TJ Rich / Jack Russell Terrier sitting, rescue dog, Wiltshire, UK

TJ Rich / Jack Russell Terrier, Wiltshire, UK

TJ Rich / Jack Russell Terrier running with ball. Wiltshire, UK

TJ Rich / Jack Russell Terrier listening to owner, rescue dog, Wiltshire, UK

TJ Rich / Jack Russell terrier shaking paws with owner, rescue dog, Wiltshire, UK

TJ Rich / Jack Russell terrier on lap of owner, rescue dog, Wiltshire, UK

Mark Taylor / Jack Russell Terrier puppy, Bertie, age 11 weeks, sitting and looking up.