I put the pen near field, so every time i tend the farm the boars do their thing..

They are indeef pretty useless though... i get like 1 meat from killing 3 home boars... if you gonna breed them, try to get stared ones..

Might breed loxes or wolves instead.

Food is no issue though.
You can easily get 100+ carrot or whatever every 3 days.. you don't need so much for food and storage space goes thin fast.. might just feed boars.