If it's not fun just burn the sim's food when he/she's hungry if seeing them throw up is funny.
I used to have the game, but I forgot: is it like The Sims 2 Apartment Pets?
I didn't trade the game in, either. I just lost it six or seven years ago.
In Apartment Pets, you have your own pet spa.
It's also easy to keep your sim's motives up (hygiene, bladder, etc.). And for me, if I can't beat a game, I don't play it for a while.
Like with Draglade I rarely played the game in four or five years until I found a poisoning strategy on YouTube, plus my own strategies I found myself. I love playing as Yuki. He's the best character in my opinion!
I'm now in love with the little "despicable" Minions from Despicable Me. I saw the second film a few weeks ago and loved it and now I adore the Minions as well. They're too cute! Who doesn't love Minions? And I might not have a new sig and avy up for a while since I'm saving Images to my 3DS Camera. Look on Examiner.com to read what they're saying in the first film's credits.