As a kid, Carmen Cesta always had a menagerie of pets in his room.
Now, at 36, he has melded his two passions, animals and entrepreneurship, into one growing pet shop business, which has expanded to a new location in downtown Syracuse.
The wedge-shaped Byrne Square building (built in 1830) now houses the fourth location for Carm’s Dog House at 308 W. Genesee St…