Of course I am completely nuts ( I am sure that I am the best friend of my vet now, we have had numerous phone calls and vet visits, a lot more then my two older dogs with Frosti ). But I would go to the vet and ask about this, although I have to admit that my dog does have bad gas ( and I have tried other food ( right now on Regal, really love his coat on that one ) ) smell wise, but it is frequent, my vet ( and my other vet, which I tried first ( not the same as with my older dogs ) didn't like it, yes I am this crazy about my dog ) said that my puppy is completely healthy.
But just to be sure and to calm you down maybe as well I would go to the wet
Hopefully everything is great with Lucky ( he is b.t.w gorgeous ) .