Well I can say this on this subject... I've had a few dogs that just wouldn't hunt at night, but did really well durring the day. Then there are dogs that hunt both... But when I got my Fred dog from Jimmy, he told me that Fred wouldn't hunt too good at night. I was like hmmmmmm... don't know about paying what I did for a dog that doesn't hunt at night. Well, I started going out with him at night, and yeah, at first there was definitely a line drawn... but after about 2-3 hunts at night he started to realize that it's all the same. Now I think he almost hunts better at night cause it stays cool and he gets gone! LOL! Some dogs just won't do it, but some with time will do whatever needs to be done... IMO.
