To be brutally honest...
I think the script needed a lot more work. The animation looks stiff but clean and there weren't any real laughs at all!
I liked some of the designs but the jokes were unbelievably stale. First of all the setting is a rip-off of Seinfeld (the pig looks like George and sheep like Jerry), the spoofing of animal cartoon characters based on superheros isn't really clever OR funny and lastly the last joke about saying something while unaware that the person you're mocking is standing right behind you has to be the most lame and predictable finish you could possibly imagine!
I'm sorry if this sounds harsh, but the script needs a MAJOR overhaul. The voices sound kinda annoying after a minute or so as well. Perhaps you've tried too hard to make them sound like "cartoon" voices.
I hope you make another soon, but please try and think it through a little better next time.