I remember an adult cartoon that I was watching approx 3 years ago. I think it was British but it had a collection of animals living in ahouse. There was a monkey that was in love with a rat ( who gives birth near the end of the film by pulling her underwear to one side). There is also a narcissitic cat and a depressed horse who jumps out of a window. The humour was way off beat but hilarious all the same and i would love to see it again
I Am Not an Animal (2004) – http://www.imdb.com/title/tt0348943/
I did look at that a while ago and the description didn’t match but just went onto youtube and watched some of it and you are correct
SOLVED
Yep, Cotopaxi strikes again!
Glad I could be of help, cat!