Thanks for that info. The vet's receptionist was talking about that unfixed tom odor and I think I assumed it was a remover not a re-scent, for lack of a better word.
As we just adopted an unfixed tom...tho as of yesterday that has been remedied! We have been using the FON, I actually haven't tried the Feliway. But we will need it as the poor boy had an accident on the seat in the van on the way home, altho we had a litterbox set up for him, I don't think he'd ever used a box before, but like the trooper he is, he has used it since we got him home.
He is a big bruiser, and he even has stitches to prove it. He was dumped at a campground (ggggrrrrr, how can anyone do that, especially to a big sweet lug like him?). When he has to go back in 2 weeks for his stitch removal, re-worming and booster shots, I will get some of the Feliway for the van seat.