Of course, all dogs change as they grow up — just yesterday you could see a cute ball of fur running around the house that couldn’t even climb up on the couch, and today, it weighs more than its owner. But in some breeds, the puppies look so different from the adult pets that we even started to have doubts about whether they were the same dog.

We at Bright Side wanted to compare the dogs of popular breeds as puppies and as adults and see how unrecognizable some of them are.

1. Alaskan Malamute

© M. Watson / ardea.com / EAST NEWS, © EAST NEWS

2. Great Dane

© gsagi / easyfotostock / Eastnews, © Tierfotoagentur.com / W. deVries / agefotostock / East News

3. Mittelschnauzer

© zastavkin / easyfotostock / Eastnews, © vizland / easyfotostock / Eastnews

4. Tibetan Terrier

© Jean-Michel Labat / ardea.com / Ardea Picture Library / East News, © Tierfotoagentur.com / R. Richter / agefotostock / East News

5. Borzoi

© Gerard LACZ / East News, © East News

6. Pitbull

© Tierfotoagentur.com / Y. Janetzek/agefotostock / East News, © MICHAL KOSC / REPORTER

7. Sheltie

© Jean-Michel Labat / ardea.com /EAST NEWS, © EAST NEWS

8. Neapolitan Mastiff

© Kalypso / easyfotostock / Eastnews, © SergeyTikhomirov / easyfotostock / Eastnews

9. Saluki

© John Daniels / ardea.com / EAST NEWS, © EAST NEWS

10. Bull terrier

© East News, © Jean Michel Labat / ardea.com / EAST NEWS

11. Dogue de Bordeaux

© EAST NEWS, © AP / EAST NEWS

12. Siberian Husky

© EAST NEWS, © Lester120 / easyfotostock / Eastnews

13. Labrador Retriever

© Jean Michel Labat / ardea.com / EAST NEWS, © East News

14. English Bulldog

© EAST NEWS, © Lancelot / Photononstop / EAST NEWS

15. Dachshund

© AP / East News, © Tierfotoagentur.com / Pfotenblitzer / agefotostock / East News

16. German Shepherd

© Tierfotoagentur.com / Traumfoto / agefotostock / East News, © McPHOTO / M. Begsteiger via www.imago-images.de / Imago Stock and Pe / eastnews

17. Bearded Collie

© EAST NEWS, © East News

18. Doberman

© Johan De Meester / ardea.com / EAST NEWS, © Johan De Meester / ardea.com / EAST NEWS

19. Briard

© Gerard LACZ / EAST NEWS, © EAST NEWS

20. German Shorthaired Pointer

© East News, © imago stock&people via www.imago-images.de / Imago Stock and People / East News

What’s your favorite dog breed? Maybe you have photos of your pets from when they were little and now?