"Nice dish for a guinea pig (5" version). Got about an 8-week-old guinea pig (about 9 1/2 weeks old in the picture). She has no trouble accessing this dish, and in two weeks, she hasn't knocked it over once. Also, haven't noticed her chewing on it at all. Maybe she has enough other stuff to chew on. Currently, she's eating Ecotrition Guinea Pig Food, although she doesn't eat any of the the colored kibbles, Alfalfa King Timothy Hay, 8in1 Yogies, 8in1 Carrot Crunchies, and some fresh veggies. Chloe, the guinea pig, is pictured in her 40"L X 20"W Marchioro cage, which we bought in store at Petco."