as always, nice animation style, cool and smooth.
I did however find it a bit different from the others, while in the others it seemed that the four just was a happy little group, without or not very much personality that gave the whole thing a childish innocence and cuteness, but in this you seemed to have given Red Rabbit a semi-negative minded personality trait towards Blue Rabbit, which gave a weird feeling to the cartoon.
However, after watching it to the end I couldn't resist saying "awww. how cute"
Keep it up