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Hi, I'm a licensed veterinarian and I'll be happy to help.
Typically, this sort of situation is not life-threatening.
IN general, most household insect control products are not highly toxic to dogs, when used in accordance with labeled directions. The amount of insecticide that would be contained on a few dead yellow jackets, would be expected to be low enough as to not cause major issues. Signs of toxic effects from the insecticide, could include tremors, shaking, seizures, confusion / disorientation. Less severe effects include nausea or salivation.
I would expect to see some vomiting, but this should last a short time. If it persists, or if any of the other signs mentioned above occur, then I would surely recommend veterinary attention.
I'm glad to hear that her signs are mild at this time. I hope she continues to improve as the night goes on and hopefully she'll be back to herself by morning.
That's great to hear, thank you for the update!!