Parsley is an excellent vegetable, well known for its effectiveness and is used for herbs. Let’s cut the story short, guinea pigs can eat parsley if you serve it to them. Guinea pigs like these vegetables and that’s why parsley remains good for guinea pigs.
It has been generally said that guinea pigs should only eat parsley to make up for certain nutrients, vitamins, and minerals in a small amount because parsley contains substances that are not good for guinea pigs when high in concentration.