It seems like only yesterday we brought our little pups home, and they looked so tiny in our hands. But they grew up so fast and we don’t understand how. These people took photos of their furry friends when they first met and when they started noticing some “big” changes.

Today at Bright Side, we’re excited to show you 25 pictures of tiny-to-giant pups that will make you say “wow” out loud.

1. “6 weeks vs 6 months”

2. “Zuko the German Shepard from 8 weeks to 1 year!”

3. “Moose: 12 weeks to 14 weeks”

4. “3 months vs 6 months!”

5. “12 weeks to 12 months”

6. “Our puppy Jojo from 10 weeks to 7 months. He’s officially too big now for my wife to comfortably carry him.”

7. “3 months vs 1 year — the struggle to carry him is real!”

8. “My chocolate labrador Eddie, 1 month vs 1 year”

9. “3 years ago when we first got her vs now!”

10. “Knödels at 6 months and 3 years”

11. “From 10 weeks to 8 months, our boy Teemu is getting harder to hold.”

12. “Ziggy got biggy.”

13. “My boy Ares at 6 months and now at almost 2 years”

15. “Heavier and older really means more to love and more time to have loved her.”

16. The dog changed a lot, but his spots are unaltered!

17. “Humphrey Bear grew into his name — 8 weeks to 1 year old.”

18. “From a 2-month-old bleep to 6 months old, then to a 1-year-old monster”

19. “Calvin at 6 weeks old and then 1 year”

20. Find a human in the second photo.

21. “1 week after I got him vs 1 year after I got him (11 weeks vs 14 months)”

22. 10 weeks old to 4 years old

23. “13 weeks to 7 months! Mom can’t hold him like that anymore!”

24. Next time we’ll expect a picture of the dog carrying her!

25. “From 4 months to 14 months”

Did your pet also grow up too fast? Do you have any sweet pictures with them? We’d love to see them!