Hmm...maybe he has a low grade infection of some kind? Urinary tract or ? Going to the vet is the best choice here!
I wouldn't worry about weather and your bullie UNLESS you are4 talking about heat. Bea and Bo both perform better when it's cool/cold. Bea is shaped just like her partents - she looks like a pig or an interesting fire plug with legs. They both LOVE LOVE LOVE the snow when it comes and I'm hard presssed tomake them come in when I think they've had enough.