"The definition of a Kodak moment," she Tweeted on Wednesday, sharing a sweet shot of the family shepherd Mate and the newest addition to the Cyrus canine clan, 2-month-old Penny Lane.
In an almost unbelievable photo, Mate towers over the pint-sized (and sweater-rocking!) pup, whom Cyrus's sister Noah, 12, adopted from Los Angeles's Saving Spot! Dog Rescue.
"I love Penny Lane," the star gushed earlier this month, posting yet another snapshot of the little furball.