"Accidentally aerated when transfer to 2ndary" ... sorry for a second there I thought maybe you farted while siphoning. While you might think it will effect your beer, and make the dog go into the other room, it won't hurt anything either.
I agree with Shafferpilot. Honestly, a little air is no big deal and at times unavoidable. After all, unless you're transferring your beer under vaccuum there is going to be air in the secondary. Think about it, the whole surface area of the beer is exposed to air. That 2 or 3 seconds of micro bubbles didn't equal out to enough surface area to do squat.
Personally, I think the whole fear of aeration is a bit over blown. Is it a valid concern, yes. I will not dispute that. Is it a bit exaggerated to the point we're worrying about exposure times in the seconds? Yes I do.
Just relax, your beer will be just fine.