Domesticated pigs should turn grass to dirt and drop fertiliser at random intervals

[sjbest123]

I live nearby several pig farms and when you drive past one, there isn't a blade of grass visible. Pigs destroy the land they live on, and as such, they should churn the grass off the blocks in their pen. Possibly creating a muck mud block.

Secondly, pig muck is used as fertiliser commonly on farms. It would be make pigs even more valuable if domesticated pigs were able to drop an item that could be turned into fertiliser using barrels or some form of composter, possibly a new 2x2 block type called muckpile, where you can store their poop. A new tool could be added which would be a muck fork, which could be used similarly to a scythe, spreading muck fertiliser onto up to six crops within reach.

Thank you for reading my ted talk.

[Dennis Cleaver]

Pigs eat grass far less so than they trample and dig it up in search of insects.

Really, any large animal should turn grass to dirt as they walk on the block enough.

Dirt then turns into mud as soon as it gets wet. Slippery until dry. 

Muck idea is fun and realistic. Soil transformations could be hard to program well enough.