Dog Lover? 5 Start-Ups to Watch

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Birchbox for Dogs: BarkBox

What size is Fido? "Small and cute," "just right," or "big and bold?" For $19 a month, this start-up delivers a box of size-appropriate treats and toys to your door. Barkbox, which raised $5 million more in funds from investors such as Lerer Ventures and Polaris Ventures, and plans to rename itself to Bark & Co., donates at least 10 percent of its profits to shelters, rescues, and animal welfare organizations.