Fallon, who welcomed daughter Winnie Rose with wife Nancy Juvonen (via surrogate) on July 23, took to Twitter Wednesday to prove his devotion to his first "kid," pooch Gary.
"I'll always love you, Gary," Fallon captioned a photo of the dog lying dejectedly next to what appears to be a baby basket.
Not that Gary has anything to worry about: Fallon brought home his doggy addition last September, and gushed about her on his talk show, too.
"She's really, really cute," he said during an October taping, which she attended. "I do love her so much."
Besides, Fallon himself cleared up any confusion. "My dog is happy and healthy and just taking care of her little sister," he later added on Twitter.
Sorry for any confusion. My dog is happy and healthy and just taking care of her little sister. pic.twitter.com/nniO8SiEoG— jimmy fallon (@jimmyfallon) August 14, 2013