Create an illustration showcasing a delightful black Patterdale terrier at the core of a jubilant birthday festivity. The dog's eyes twinkle with glee, expressing the excitement of the occasion. A skillfully incorporated '21' can be observed on the terrier's collar, serving as a representation of the milestone age. The backdrop is adorned with fanciful cupcakes and gifts, further enriching the birthday ambiance.

Generated with these themes: Black patterdale terrier, and 21.

Made with ❤️ by AI.