I’ll see your examples and raise you…
 

 
Some baby bats in a leaf

Twily.
 
And why would you put OP’s childhood photo on the internet?

Maybe if it was a yellow lab puppy, but since it isn’t I’m voting for filly Twi.

the puppy

Filly Twi on account she is intelegent enough to comprehend my love for her.
 
Also you suppose on fathers day there will be a brony bait line?

Filly Twi.

>no applejack

Obviously the Duckling!

Cannot choose. CUTENESS OVERLOAD!!!

They are cute, and hard to choose from  
 
But I think this is the cutest

The puppy.
 
Ducks are fucking bullshit.

@Shaky  
Touché.

That duck is precious, but I will raise you,  
 
…infant polar bear!

@PrisonedMuffin  
>As cute

Fluttershy.

@Shaky  
>implying grown up dogs and ducks aren’t cute

Twilight. Because I know the puppy and duckling won’t be still be cute when they grow up.

 
CUTE OVERLOAD!

puppy.  
However Twilight will be able to keep her cute while the others lose it very early in their ages.
 
@ArchimedesOgle  

Tree kangaroo.
 

Am I the only one who thinks adult Twilight is cuter than filly Twilight?

 
“This dead crab is cuter than Whizzo Butter.”

Twilight
 
I seriously HATE puppies.

 
“Does no one care about me?”

Puppy.
 
Now if it was Sweetie Belle…