This is really weird. We have Concord grapes growing on a trellis across the back of the house. They never bothered the cat before, but for the past few weeks he has decided that he doesn't want to walk under the grapes, so now I have to carry him in and out the back door. At first I thought he was afraid of the wasps the grapes are attracting, but he's still chasing wasps elsewhere (in the yard and out on the balcony). Do you think it could be the smell? We've had twice as much sun as usual, and there are far more grapes than usual.