Boutique treats and toys for dogs, it turns out, are a big business. Bark was co-founded by Matt Meeker, who's now its CEO. It's the seller of the subscription BarkBox. And it expects to do a quarter billion dollars in sales in 2018. 

Americans spend about $70 billion a year on their pets; that’s part of the reason why General Mills just announced that it plans to pay $8 billion for pet food maker Blue Buffalo. And it’s part of the reason why I went to see Matt Meeker at Bark’s headquarters in New York City’s Chinatown, and learn how he saw this pet-pampering mega-trend coming six years ago.  

When you’re pursuing a big idea, it’s important to keep refining it, and questioning your assumptions. That’s one of the things I took away from Matt’s story.