This is an old show, that aired on cartoon network from 2001-2003, in america. It's actually a pretty good show, which uses CGI. It only lasted 2 season though, consisting on 13 episodes each (26 full-length episodes all together), and it was really good. You'd really love this show, if you like dreamworks movies like shrek or Antz.
You can watch all 26 episodes on Netflix (Watch instantly), or you can watch all 26 episodes Free, and legally at Hulu.
Hulu Link: http://www.hulu.com/sitting-ducks (Their split into seasons just click the 1, or 2 where you see you see it say like season.)
Wikipedia Page: http://en.wikipedia.org/wiki/Sitting_Ducks_(TV_series)
IMDB: http://www.imdb.com/title/tt0368543/
It's a really good series, In my opinion, I don't see why it was cancelled, and I really think it'd be cool, if you guy really like the DVD, to buy the first season boxset (They haven't even released the 2nd ), so that maybe it'll be like family guy. lol.
Amazon: http://www.amazon.com/Sitting-Ducks-Sea ... 680&sr=8-1
You can buy it there, just scroll down (on the new page) until you see the seller Amazon.com. Unless you want a used 1 cent copy lol.