Hazelnuts are also known as cobnut and are a very popular filbert nut.
The seed in the middle is edible raw or roasted. In order to eat the seed you need to crack and remove the shell.
Another use of hazelnuts is to use for crafts. Things such as bracelets and necklaces can be made by drilling holes in the nut and putting a string through a group of them.
So can guinea pigs eat hazelnuts at all?
The simple and quick answer is no a guinea pig cannot eat this type of nut.
Actually guinea pigs cannot eat any type of nut for that matter. This particular nut is high in fat and phosphorus content which is bad for a guinea pigs health.
The one big benefit of eating hazelnuts is that they have a lot of Vitamin C but it isn’t worth the risk to feed to guinea pigs as the negative health effects out weigh the positive ones.
Therefore do not feed hazelnuts or any type of nut to your guinea pig at all.
If you guinea pig eats one or some by accident talk to a vet immediately for medical advice for your pet.