This mod modifies the buyable betails, depending on the species they will eat and produce more.
Concerning pigs: now they produce almost the same amount of manure and slurry as cows, which gives them a real objective: to fertilize your fields.
For other animals, there is a standard increase in difficulty. x5 means that this animal eats and produces as much as 5 of its colleagues.
Check with your local pet owner for more details.
Fix for Animal Species - Wild pig pack