I think my guinea pig is over weight

Question
I have a female guinea pig and her lower half is huge shes about 3-5 months! i also have two older ones that are about 1 and a half who are not so fat (just a bit tubby) and there all girls i cheacked.They have a cage that is 70cm wide and 140cm long and they go outside into their hutch (slightly bigger) every good day please help what should i do?????

Answer
Hello,
Make sure your guinea pig isn't pregnant because although she may live with girls she could have been pregnant when you bought her. Do they eat all that you put into their food bowl, because I think that you should cut down on their food a bit. Maybe you could buy them leads so you can exercise them separately each day. When the weather is good you could also put them in a fox-proof run for about an hour. If you are still worried or your guinea gets fatter it would be best to contact your vet.
Best wishes
Aleksandra