In SimAnimals, there are 3 animals that you won't find in normal gameplay. These are the Panda, Red Panda, and the Ferret. Red Panda: On the pause menu, under "enter code" type in RED PANDA Panda: On the pause menu, under "enter code" type in PANDA Ferret: On the pause menu, under "enter code" type in FERRET
I hope these cheats provided you with these unlockable animals. You can ony get one gender of this animal and that is the female.
For this animal to become available you must enter an unlocked forest area at the beginning of the game and press the 2 button on the wii remote. This will bring up the 'Pause' menu where you then select the 'Enter Codes' option and type the code 'PANDA' (case sensitive and without the quotes).