As the eldest Apple sibling, Big Macintosh has always cared for his family. There was a time, when he and Applejack were still young, that Granny Smith felt like giving the young'ins a bit more responsibility. That was when they picked up Winona. Applejack loved that dog with all her heart, and in her youthful mind, believed that her dog could do anything. Now, around that age, Applejack had been a picky eater. She ate anything related to Apples, but never wanted to eat vegetables, and stubbornly resisted any attempts to change her mind. Big Mac had spotted this, and decided that to help his sister grow up big and healthy, he needed to fix her diet. It took a while to come up with a plan, but one day, when the two foals and their dog were playing in the yard, Big Mac challenged his sister. He bet her that he, and her dog could find a vegetable that she would eat. If so, after that she would have to eat all of her veggies from then on. Torn between her stubbornness, and her faith in Winona, she agreed. So the dog and the boy set out. A short while later they came back, Winona holding an apple blossom. Knowing that flowers weren't considered a vegetable per se, she confusedly agreed that the offering was something she ate, but that he needed to find a veggie, not an apple bloom. Big Mac smiled. "Eeyup. 'Cept since Winona found it, that there's a collie flower."