Dad's def not allergic to me or my perfume, before I got Odie I used to spend most weekends at their house and of course prior to getting married I spent 20 years living with him

I use the same body spray/deodourant all the time and he has no reaction to anything when me and the kids visit.
Odie doesn't have any spray etc. My mam told me his reaction was on the evening (ie. at least 7-8 hours AFTER touching Odie). As I don't know how asthma/allergies work, I wasn't sure if that could be right or not? Surely the reaction would be almost immediate (or at least within an hour or so?). No symptoms occurred during the day because he was helping my husband all day.
I've recently changed Odie to JWB but as I've been keeping both of them separate for weeks now, he hadn't started that food the last time they met. Prior to that, he'd been on the same food as his own dog eats so I know he hasn't a problem with the food.
He is only allergic to cats/horses and certain dogs it seems.