No worries. I'm assuming you are asking about parasite control in your piggie. Generally many piggie owners do not tend to treat their pigs with these kinds of things, but its all about personal preferance. Piggies dont get fleas, so no need to flea treat them, they do however often pick up mites, fungal infections and the new thinking is that they can also carry worms.
Some owners decide to worm there piggies about every 3-4months, i do this, many/most dont. Some people like to treat for external parasites (mites etc) with ivermectin on a regular bases. The best thing you can do is buy good quality hays, keep their home nice and clean and bathe reguarly to help prevent skin conditions. Have a look at the gorgeous guinea website, some info there, and some great products.
www.gorgeousguineas.co.uk
So in short, its all about opinion.
x.