At Harringtons, we believe every pet deserves natural food that’s balanced, wholesome and tasty. Harringtons Optimum Guinea Pig food consists of all in one nuggets to help prevent selective feeding. Harringtons Optimum Guinea Pig Food is a complementary guinea pig food and is a great accompaniement to fresh hay. s part of our efforts to keep packaging to a minimum and help send less packaging waste to landfill, this pack can be recycled. Harringtons dog food is proudly made by ourselves right here in the UK and has been family run since 1923.