Rat 3?

Card	Rat 3
Set	Chinese Zodiac
Edition	Puzzle
Book value	Est. 8 to 20 Credits once graded
Checklist	81 / 120
Rarity	Common
Owned	1

Rat, piece 3 of 9

A rat's front teeth never stop growing, so it must gnaw constantly to keep them worn down. Rats can also squeeze through gaps not much bigger than a coin.