One of These Things is Not Like the Others

I wonder how many of you remember a recurring segment from Sesame Street where children were encouraged to spot differences between 3 or 4 items. Just to jog your memory, sing along with this: https://www.youtube.com/watch?v=Ect-kgxBb4M
I found these 3 bunnies on the same walk, but "one of these things is not like the others." Can you spot the outlier?

[Kerri]

Cute shots

[Rick Schies]

Oh yes, and it seems like only yesterday

[Dawn Ulmer]

I remember the song and this is a great collage to go with it!

[Julie Duncan]

"smile" :)

[Ann H. LeFevre]

I remember that one! Well, they are all cute, but I'm pretty sure one of them cannot hop without human assistance!