Overweight Guinea pigs

Tazmin

I got my two girls about 4 yrs ago now they where only baby’s but they where quite big. Iv been to the vets many times and no one can tell me there breed so I have no clue if it’s in the genes to be a bit bigger. Ok they maybe a cross of teddy-bare and something else. They have plenty of room to run around during the day, hay, pellets and veggies are an everyday given thing to them and I feed grass and dandelion leafs like ever other or small portions every day, I truly dk if I should cut down there food as they do get spoiled 🙊 is there any food that makes them bloat or bolk out? They r only given small pieces of apple or banana once in a while so idk what iv been givening them that’s gaining there weight 🤷‍♀️🤷‍♀️🤷‍♀️