Did they both happen outside? Is it too early for wasps to be coming out of the ground? I haven't seen bees here yet, only flies. Spider bite? She most likely was rummaging in the grass and happened upon something - but I agree, you need to know what that something is! If there was something she was allergic to, it wouldn't only happen the one time then not again. Did the swelling start out as small hives on her muzzle then "morph" into a giant, swollen muzzle? That leads me to believe it was an insect bite/sting. Poor baby - I know that look all too well from last years bee sting. If you figure it out, be sure to let us know. HUGS!!