I vividly recall seeing this rather bizarre cartoon in my childhood in the early 2000s, but after years of occasional search have not been able to find it. I remember parts of the plot, but I'm certain of two things. There are two distinct things I remember about it: It had a flying pig and a wolf trying to catch it, and the cartoon was mostly silent as there was no dialogue.

Here's the plot summary:
>plot starts in the spring, and we see flocks of flying pigs returning from the South
>one of the pigs flies down into the forest below and drops its wings
>a hungry wolf sees the pig and decides to catch the pig
>the rest of the cartoon are mostly about the wolf's failed attempts at catching said pig, who remains smug all the time
>at the end of the cartoon, it's autumn again
>the pig looks up into the sky, and sees its mates heading south
>the pig grows back its wings and joins the flock of flying pigs
>the cartoon ends with the wolf longingly gazing into the sunset

This cartoon was shown on the Finnish Public Radio's TV channel around 2004-2006. The animation style, as much as I remember it, reminds me of Canadian and British cartoons. I might be wrong about its origin of course, since it was not unheard of for them to buy cartoons from around Europe, US, and Asia.