Something like this?

https://steamcommunity.com/sharedfiles/filedetails/?id=2829020024

It's an automated wolf feeding system and the way it works:

- 4 boars are raised on the 4th floor with the bottom of their pen built with beams wide enough for piglets to drop through.

- Born piglets drop down to the 2nd floor (must be at least 2 floors for the above boars to reproduce again) where they grow up and are pushed out by the lack of space into a fire or spikes (spikes break easy, standard fire better) where their meat is eaten by your domestic wolves.

It isn't as easy to achieve anymore as it once was, but it is absolutely doable.