low level poisoning?

[valerie powery]

Okay....I have a reoccuring problem with my chocolate lab. She is 3.5 years old and in good shape. I am thinking she is possiblely getting low level poisoning via our bug spray guy. The first time they did the house, they used granules.....no problems. But the last 2 times, they've sprayed the yard. I am careful to keep the dogs in the house during this time. But even a couple weeks later, my lab will play with a toy or something, a stick even. She will come in the house swallowing, low level drooling...NO FROTHING. Her bowel movements are fine..no blood or diarhhea. Her appetite and eyes, gums, everything seems normal. The only thing is that her dewlaps 'seem' to be an ensy bit swollen, she licks her lips alot and drools. The drool is clear and is not stringy or viscus.....just droplets like you would see when a thirsty dog drinks water. could this be a symptom of
some disease?
Today I picked up very toy, ball....everything I could think of that may retain the bug spray and pitched it in the trash.
I have a terracotta pot that I noticed shattered due to some snow....I have to move it but it is too heavy right now.....could that be a culprit? I was even wondering about some low level shock from our a/c unit or cable on the house....I haven't seen any exposed wires though....grasping at straws.