Yes, it's normal.
But that cage is WAY too small for a guinea pig. If you're looking for another pig from a rescue, you're going to have to prove to them that you have a MUCH larger cage for two pigs. The bare minimum for one pig is about eight square feet, and it's more for two pigs. I'm guessing you don't even have five square feet in that cage.
And the pigloo takes up too much room. Also, it's hard to get hay out of that rack. If you're going to keep using it, stuff it full and pull some of the hay strands through into the cage so the pig can get hold of them. The bars are too close together for her to get her nose into to grab the hay.