So I have 7 guineas. I thought I have 5 pearl greys, but one looks different than the others. It's sitting between the 2 lighter colored ones. The second picture it's spreadout(they are so difficult to photo). Is it a pearl grey or something else? I'm new to guineas, and I can't figure out the color scheme. I even looked a charts and can't tell anything... Any help would be greatly appreciated. Thank you!