Hi, I have 2 guinea pigs. 1 is 2 years old and the other 24 weeks old. They have shared a 3 x 5 cage now for months. I had the 2 year old first and never had a problem with a smelly room or poop. Only when I got another guinea pig the smell has got really bad. That bad you can smell it as soon as you walk in the room. The colour of it looks fine and it's quite moist. I feed them Timothy hay, pellets and a variety of veggies. 2 leafs of romaine lettuce, 3 slices of cucumber, 6 strips of yellow pepper, occasionally a slice of carrot. I'm I giving them too much veggies and why its causing the bad smell or is there a problem with them? They are both girls