saying

[robinbrown]

what is a dogs nose

[Ember]

Not really sure but would guess either muzzle or snout.

[kaz35]

something that it smells with.

[splodger]

I think it's also a drink or cocktail. Someone once told me it's beer and gin, but this sound too disgusting to be true. Mind you, he was an alcoholic

[NoGood Boyo]

Splodger is correct. It's gin in draught beer. I'm not an alcoholic, but I was once a cocktail barman!

[Azimov]

And here was I looking for a rhyming slang answer!!
I thought it might be "clothes" as in "Get your dogs on you Lionel (Bart)"

Just me then? :)