The loving friendship between Mr Reagan, a two-year-old Australian Labradoodle and his owner’s grandchild has been captured in a series of cute photos.
The photos have been shared with the 60,000 Instagram followers of Reagan’s owner, Sandi Swiridoff.
The best buddies, the dog and Sandi’s grandson, have been photographed wearing matching outfits and cuddling and kissing each other.
To protect his grandchild’s identity, Sandi has got creative with ways to show their connection without revealing who the child is.
Sandi and Eric Swiridoff adopted Reagan when he was just eight-weeks-old, when her daughter had to give up her foster children.
Mrs Swiridoff, a nurse from Portland in Oregon, USA, said: "Reagan's sweet little buddy and best friend is my daughter's foster child - they adore each other.
"When Reagan's little buddy came along a year ago, he and Reagan bonded immediately, and have been the best of friends ever since as he and Reagan are the same age.
"When I put the baby down for a nap, Reagan stays right outside his door and waits for him to wake up and play."
When the dog was six months old, Mrs Swiridoff started to upload the pictures to Instagram.
She added: "Reagan loves dressing up, he loves treats, loves the camera and loves people.
"He knows that where there are photo shoots, there are treats and praise.
"It is a bonding experience for us. When he is dressed up, it's only for a few minutes while I take the photos, then he gets to return to being a 'normal' dog again."