tara and jason o’mara of portland, oregon, the entrepreneurs behind pdx pet design, pitched their business on shark tank in january 2017.  they approached the tank in search of a $300,000 investment in exchange for 15% equity. they requested $300,000 from the sharks in exchange for a 15% interest in their firm. they created their next toy with the premise that grooming is a way for cats to bond socially. the cat appeared unconcerned when robert said they must be …