If you're getting a pair its fine. Else no. GP are a very social creature, they need constant companionship be it you or their own kind.

Also will your dog bark a lot? GPs are easily startled and can suffer heart attack (serious woi) so barking might stress them out.

Guinea pigs are normally very quiet creatures, often the only sound u hear from them is when their on plastic and they start scratching their body.
This only applies when its not feeding time where they will yell the lungs out to get attention. Regarding smell, as long as u dont have irritation to hay and u clean the cages often then it should be ok.