Spooky & help me the sex of this little mouse

Question

Boy or girl  

2nd photo   I am going to the pet store first thing in the morning for meds for Spooky, also could you help me with the sex of this little one.  After about 21 little mice you would think I could tell, this is my first time with little girls, I have this one as a boy, is it a girl? Because I want to put him back with the mother if he is a she.
I am sending 2 photo's of little one.

I am so sorry I didn't know about this site before. You have helped me so much. And I taught me so much I didn't know. Most of my little mice lived from 2-2 1/2 years . Spooky has been with me the longest. But I always wondered if I was doing something wrong. And now I know.

Answer
Hi Leah,

He is a boy.

Are you on Facebook? I run a rat and mouse group called Rats and Mice are Awesome (Facebook name only has rats):

https://www.facebook.com/groups/RatsandMiceareAwesome/

I am not the only helpful person-- we also have a couple of excellent mouse breeders, vet techs, etc. along with a ton of rat stuff. It is a really fun group.

We have a ton of references to everything you want to know about mice :) to photos to... whatever your mouse needs are.

Warning: More than one person I invited from here has ended up getting rats too!!

Do introduce yourself to me in pm :)

Squeaks n giggles,

Natasha