They should settle down together over the next few days. Yes, he will smell odd to her, and animals have an uncanny knack of knowing what they associate with the V E T (and therefore often sickness).
Gill, it's good to know when things like this happen, there are others on the forum who can offer constructive help and you've been there so often with your lovely Gang of Four (past and present)
Poor Ducha. Loopy clearly cares a lot about him. It's just his "Geordie Way"
Anyway, just wanted to say I hope Harry's spent a comfortable night back in his old familiar surroundings.
Good luck with today's visit, and witht he food - hopefully you'll be able to ghet him the wet variety and keep everyone satisfied in the kitchen department.