Jennifer Aniston paid tribute to her dogs on Wednesday's National Puppy Day, sharing several adorable pictures of them on Instagram.MORE: Jennifer Aniston shares heartbreaking tribute in honor of International Women's DayTaking to her Stories, the actress delighted fans as she said never-before-seen snaps of her pet Chesterfield as a puppy.WATCH: Jennifer Aniston stuns in gold tassel trousers"I don't know if 'National Puppy Day' is a real holiday… but I'll take any excuse to post Chesterfield throwbacks," she wrote alongside the first picture, which showed Chesterfield posing for the camera.READ: Jennifer Aniston shares incredible behind-the-scenes footage of Reese Witherspoon for special celebrationRELATED: Jennifer Aniston's lavish bathroom at $21m home is basically a spa – full lookJennifer later posted two videos, one of Chesterfield as a small puppy and another showing him all grown up. Jennifer paid tribute to her dogs, past and present, on National Puppy Day"From this… to THIS," she captioned the clips.Following her sweet tribute to Chesterfield, the Friends star went on to honour Dolly, who sadly passed away in 2019."Hi! I'm Jen and your name...? Dolly.