i know corn will make them fat. I don't know how old they are! the "worker man" where I bought them said they were one week then someone else there told me they were 2 or 3 weeks.
I am pretty sure the darker ones are a lil older then the yellow/white ones!
I'm BLONDE and new to this!
how long have you had them ? they are normally just a few days old when you buy them.