1. These cute 5-week-old puppies are only slightly bigger after 55 weeks...
2. What a difference six months can make!
3. These best buddies have been sleeping like this every night since she was 10 weeks old.
4. She'll always be beautiful, whether she's 2, 5 or 12 months old!
5. What a rapid transformation, from 9 to 13 to 21 weeks old.
6. Can you believe that these photos were only taken 12 weeks apart?
7. One year on, and this big guy still wants to be carried around!
8. "No matter how big I get, you'll always be my pillow!"
9. Only a year has passed, and our fluffy friend is already twice as big!
10. And yet another big fluffy surprise!
11. You'd better start hitting the gym if this guy wants you to carry him around all day!
12. Now you see me, now you don't!
13. "Why is my favorite spot shrinking?!"
14. 365 days later and this little nugget isn't quite so little anymore!
15. Some things never change!
16. Best friends are for life!
17. Once a lapdog, always a lapdog!
18. "Who's the pipsqueak now, sis?"
19. Not all dogs have to triple in size. Some are fine just the way they are.
20. Little Irwin...Big Irwin! And only 365 days in between.