I would have thought that once a week was quite often for a dog bath

Poppy only ever gets bathed if she has rolled in something, which is never, or if she has accidentally got into some mud, which was once. Other than that it's when she goes to the groomer.
Daisy is easy care and most mud will drop off her but if she's got some really claggy mud then she has a bath. If she rolls in something then she gets a spot wash to get rid of it. A full bath is a very rare thing, although she does have to get showerd off after swimming in the hydro pool which is a shame imo, and her coat is a lot coarser since that has been going on.
The thing is - neither of my girls smell (and I know that because people have commented on how my house doesnt' smell doggy - I know you can get immune to your own dog smells!). Is that to do with the type of coats they have and the not shedding perhaps?