Your friends might be amazed at how your Border Collie seems to understand you, but you know better. She really does understand you! After all, she’s the smartest of all dogs! Spread the love for your extremely intelligent and energetic animal with this personalized Border Collie T-Shirt. Care: 100% cotton. Machine wash warm, no bleach, tumble dry low, warm iron. Available in Infant, Toddler, Youth, and Adult sizes. Personalize your t-shirt by using the "Personalization" box above.