Animated ESTONIAN (NOT Czech) film about alien rabbits

Neither.

EDIT:
I've found it!

Boy, is it kind of obscure.

It isn't Czech, like I said it was; it was Estonian. Which is, I know, COMPLETELY different, I don't know how I confused the two.
Also, it wasn't released in the late '80s; it was released in '98. I was WAY off.

Process for finding it:

I remember I first found out about the film through Wikipedia; I was reading the article on the Simpsons episode, "Krusty Gets Kancelled".

In the episode, Krusty the Clown shows a short animated clip called "Worker and Parasite".

In the Wikipedia page, there was an entry saying that "Worker and Parasite" was inspired by Eastern European animated films.

I remembered all this, but could not find any trace of the entry when I visited the Wiki page recently. It was lost to time.

And then I remembered that I had the Wayback machine to use.

SO.

It took some time to find the exact date (sometime in 2007 [Wow. 11 years ago]), but I was able to eventually find it!

In the 2007 Wikipedia article of "Krusty Gets Kancelled", there was an entry that said that "Worker and Parasite" was inspired by animator/directors like Priit Parn.

So, all I had to do was Google Priit Parn, and sure enough, I was able to find the film I was talking about in his Wikipedia page!

The film I was talking about was "The Night of the Carrots".



If you wanna watch an obscure, strange film that is hard to understand (I don't believe there are subtitled versions online), then give this one a go.