Boy Or Girl?

[akfox18]

Is my yellow lab a boy or girl? He/she gets slightly darker every now and again

http/www.flickr.com/photos/75979185@N06/8661299566/in/photostream

http/www.flickr.com/photos/75979185@N06/8661299536/in/photostream

 

[james41683]

easiest way to tell the sex of labs is to vent them. they are numerous how to's floating around on how to do this,

 

[akfox18]

they're swimming about and are very fast - id never catch them! ill just leave them be and see. one i have is clearly a male. i suspect, after having done a bit of research, that the others are female. thanks for the reply though  

 

[DerpPH]

Males have a stripe on their back fin..