I keep seeing such a size difference between males and females which has really caused me to think twice about Sly. Ella, I don't really have a doubt she is female, but either Sly is huge for a male or he's not a male

I've included some "belly shots" and below are pics of the two of them together, including the last one that shows the differences in their head shapes. Ella is not "flattening out" being defensive there, either, that's how she always looks.

Thanks for you opinions!!! I was just looking at the pics again and he really does look male to me, but I'm planning some housing changes so need to make sure I've got this right!