satin guinea

I am concerned because I’ve always noticed his coat was shiny. I really can’t tell if it’s just a healthy coat or if he is satin because of his dark fur. I got him from petco, not sure if they sell satins there. Am i being paranoid or could he be satin? Thank you ♡

I recently acquired a Rex guinea pig that you can definitely see some satin in it especially when it is in the sun. A friend of mine is a guinea pig groomer and she agrees that it has some satin in it. I have done some research online but keep finding mixed and contradictory information. I...