(not the end of the world but it will clear out your sinuses).
I was wrestling with a crazy ex one day and she jokingly sprayed our pepprer spray into the carpet next to us, just a quick spritz. She thought as long as it didn't hit you, you were good............
about two seconds after she sprayed it we stopped wrestling and we could see the terror come across each others faces as the gas hit us. I spent three hours trying to get my eyes open as mucas spilled from my nose and mouth, The house had to be evacuate, everyone was coughing.
And for three days after every-once in a while I would brush my eye and there must have been something still in my tear duct because eyes slam shut for another half an hour.
I know dogs are tough, but get that in there nose and eyes..... then again I may be underestimating there determination. Plus the collateral damage might be bad too.
Fox labs pepper spray was used in this case.