My biggest and most obviously female does have a saggy throat at times also, so that is not always an accurate way to tell with the greys. -Name:  IMG_0497.jpg
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Size:  38.5 KB Edit- Those 3 are all my female, will try to find a pic of my male for you.

My male was about a half inch when I got him 1 year ago, and started calling around Jan-Feb of this year.