Hi Anthony, and glad you're here on EBN
How did Scully do at your GF's parent's home? Was he still panting and wheezing? If so, then I'd think there may be something physically going on with him and a trip to the vet should be in order. If he was more his "normal" self, no panting/wheezing or discomfort than i'm wondering if the move to the new house has created some kind of anxiety with him. It's hard to say. Or perhaps something environmental at the new house? does he have allergies? How long was he at the new place?