
We have a Golden Retriever and a smallish terrier cross so one big dog and one small.
The GR comes home from every walk - even in the height of summer- plastered in mud. He takes a fair while to dry out but the mud seems to just drop off him as it dries. You can always tell where he has been lying down by the dog shaped pile of dried mud that is left behind :D He gets a quick brush once he is dry and a thorough brush twice a week.He was extremely easy to housetrain and always asks to go out if he needs to by giving one bark at the back door. The only time he smells is if he is wet which can be said for nearly all dogs.
Our terrier is not so keen on getting wet and muddy but any mud he does collect has usually dried and fallen off him before we get back to the car. He is short coated but can smell a bit doggy at times and he absolutely stinks when he has rolled in fox poo

. He took longer to be reliably housetrained and the only indication he gives that he needs to go out is that he will sniff at the back door. We have to make sure he is given the opportunity to go out on a regular basis as his silent requests don't work if you are not in the same room as him :) He took a couple of months to housetrain but he was in a rescue kennel for a number of weeks so that obviously made a difference. He was about 4-5 months old when we got him and have no idea if he was housetrained before he went into rescue.
Both dogs will go out to relieve themselves on command now which is very useful.