A lot of us welcome pets into our homes for companionship. It doesn’t matter how long you’ve lived with your furry friend, they certainly belong to the family — and watching them grow is one of the most fulfilling experiences a pet owner can have.

To celebrate this, Bright Side has gathered 17 before and after pictures from pet owners all around the world.

1. “Still making sure you’re safe from the water.”

2. “One small step for dog, one giant step for puppykind!”

3. “We’ve bought him several bigger beds, but this one is still his favorite.”

4. “13 weeks to 11 months!”

5. “Some things never change.”

6. “From 8 weeks old to 2 years! Here’s my pretty Aussie girl, Ripley.”

7. “Mithy from 4 months old to 3 years old — she still likes napping on Dad!”

8. “1.5 months to 10 months”

9. “Almost a year together and Mojo is NOT impressed that his desk drawer has shrunk so much.”

10. “Harley at 9 weeks vs 1 year and 1 month”

11. “Morty Moose has always loved showing off his belly. 8 weeks to 4.5 years!”

12. “Cherry at 8 weeks and 1 year old”

13. “Jonesy at about 10 weeks old vs Jonesy at almost 1 year old”

14. “2 months to 1 year (in the same nap spot)”

15. “Doodles, 9 weeks to 5 years — once a shoulder kitty, always a shoulder kitty.”

16. “Mathers, from 7 weeks to 7 months!”

17. “From 8-week-old rescues to healthy 8-month-olds! They’re still best friends.”

How old are your pets? How have your pets changed from the moment you got them to today?