We don't have a dog, so I don't think she is imitating one. She pants, grunts (when not pooping), she'll even start chewing on a toy and when she turns to reach for another toy, she just hangs onto the chew toy in her mouth. It's hysterical. She blows raspberries too, but mostly she pants and makes sounds. Anyone else's LO do this? She's not babbling yet, which I guess is OK at her age. Just making sounds.