What is the crossword answer for the clue: Im as happy as a ___

CLAM - a 4 letter word may be the answer you are looking for!

LARK - a 4 letter word may be the answer you are looking for!

PIGINSHIT - a 9 letter word may be the answer you are looking for!

DOGWITHTWOTAILS - a 15 letter word may be the answer you are looking for!

I'm as happy as a ___

4 Character Answers:

CLAM

LARK

9 Character Answers:

PIGINSHIT

15 Character Answers:

DOGWITHTWOTAILS