"This little piggy got eaten by a slime..."They're the slime rancher variant of pigs, and an alternate version of Hen Hens.
Porkos can be found in all areas. They act like hen hens, but make slimes drop 2 plorts from eating it or 4 from their favourite, it also fills up 2 for Gordos and 4 if its their favourite. However it will make them full for triple the regular time, and making Gordos reject food for 30 IRL seconds. Making it rather useless when your slimes favourites are easily harvest-able.