Hundreds of dog lovers visited the New Canaan Nature Center on Sunday for what has grown into one of the community’s favorite annual events. Dog Days New Canaan, sponsored and organized by Pet Pantry Warehouse, was held on a clear, warm day on the grass field next to the Visitors Center. “Absolutely fantastic today,” Ari Jacobson, vice president of Pet Pantry said as hundreds of dog owners leash-walked their four-legged companions through the activity-filled field. “Couldn’t have asked for a better day with the weather. New Canaan Nature Center is hosting us again.