a close-up of a jack russell terrier's face, focusing on its distinctive markings and charming expression

jack russell terrier dog small energetic playful intelligent loyal lively friendly alert agile cheerful spirited compact smooth coat fur affectionate happy bold curious enthusiastic interactive mischievous charming engaging fun delightful expressive heartwarming joy friendship character personality warmth close-up terrier#39aph39#s face light backdrop focusing its distinctive markings expression tail wagging against background radiating excitement