There's two ways to go with animal ads: funny and poignant. Understandably, most choose the former—animals, after all, can be pretty damn funny. But the poignant ads, when done well, can get even more attention. We've seen this time and again over the years—notably, with Purina's 2012 "Inside Every Good Dog Is a Great Dog" spot, which left viewers a blubbering mess. This new 60-second anthem commercial from Petco, by new lead agency Vitro, fits into that tradition, going beyond the laughs into what's special about the bond between man and beast.