dbounds its been my experience that some types of snow seems to hold scent better than others. My female has a hot nose and she too will not open unless she is close to the jump where my male will cold track to the jump,but when the temps are warmer and the snow is sticky shes seems to have a much easier time on snow. Air temp.,humidity etc. all play a role in it but i would be lying to you if i told you i understood it all. :headscratch: