@WheekingPiggies is correct, I was referring to the brown log. It's called the snack shak log and is made with honey which is bad for pigs. It's not good for chewing or nails, no matter what the petstore said.
Petstores say a lot of things and sell a lot of things that are not good for pigs. They do it because they are only interested in making money, not in the welfare of the pigs. This is why they sell exercise balls, wheels and yogurt treats with guinea pigs on the packaging. None are good for pigs and in fact are harmful.
The green chew sticks are hit or miss when it comes to whether guinea pigs will actually use them. In my experience (and most people here will also tell you) that those sticks are largely ignored by pigs.
When it comes to food, Kaytee is a brand that is bottom of the barrel. They sell the junkiest pellets with all kinds of crap mixed in. It's completely unnecessary to have anything mixed in. As I said, it encourages pigs to root around and pick out the junkfood colored bits and ignore the pellets which are the only part that has any nutrition at all.
I would either pick all the colorful bits out or toss the food altogether. Get plain pellets and you are on your way.