Toddlers start recognizing themselves in a mirror when they are around 18 months old. Passing the 'rouge test' is one sign that a child's cognition is developing properly.
In the animal kingdom, higher primates, dolphins, orcas, elephants, and European magpies are the only animals to recognize that what appears in a mirror is actually their reflection.
And, not surprisingly, pigs don't recognize themselves, but do use clues in mirrors to focus on food that is placed behind them!
So what about cats and dogs? Domestic animals are usually startled by images in a mirror when they are young, and when the images don't pass the "sniff test" (which they never do!), the dog or cat learns to just ignore them.
So...not sure what Juno thinks she sees here?
Wait... - is she napping? Diva.