It shouldnt even notice it if you keep your guinea pig in a good sized cage off the ground they should leave eachother alone completely, my good friends have a dog that lives with guinea pigs in the house walking free, but I wouldnt do that if I were you lol, that dog was raised with them
But as long as you keep it out of sight away from the dog they should be just fine together
But as long as you keep it out of sight away from the dog they should be just fine together