None.

Happy is constantly bullied by his two brothers due to his small size. The bullying is mostly mild.

Some scenes have a dog chasing small animals; Some rabbits and a chipmunk.

Two rabbits are caught in a cage.

None.

The bullying Happy has to endure in the beginning may be kinda upsetting for some kids.

Elmo the dog tends to have a ferocious look when chasing some rabbits.