I would spray for ants if you can find the areas where they are.
But also, all dog owners should have Benadryl on hand - both cut-up pills, and in liquid form. ANYtime you suspect a sting, you should give Benadryl asap, at 2mg/lb of body weight. It can literally save a life.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |