To find the lightest guinea pig, we can examine the weights provided for each guinea pig. The weights are as follows:
- Guinea Pig 1: 28 oz
- Guinea Pig 2: 14 oz
- Guinea Pig 3: 8 oz
- Guinea Pig 4: 20 oz
- Guinea Pig 5: 4 oz
- Guinea Pig 6: 10 oz
- Guinea Pig 7: 24 oz
- Guinea Pig 8: 12 oz
- Guinea Pig 9: 6 oz
- Guinea Pig 10: 10 oz
- Guinea Pig 11: 17 oz
- Guinea Pig 12: 18 oz
Now, we identify the lightest weight from the above weights:
- The lightest guinea pig is Guinea Pig 5, which weighs 4 oz.
So, the lightest guinea pig weighs 4 oz.