jack russell terrier captured mid-jump on a light background, embodying the breed's signature agility and enthusiasm

jack russell terrier dog small energetic playful intelligent loyal lively friendly alert agile cheerful spirited compact smooth coat fur quick responsive gentle interactive smart sociable warm cuddly watchful engaging bouncy feisty cute adorable enthusiastic vibrant fearless quirky character distinctive delightful captured mid-jump light background embodying breed#39aph39#s signature agility enthusiasm poses soft highlighting its features expressive eyes