This morning I called the vet, and they told me to bring the dogs by so that they could run some tests; they emphasized that grape toxicity entirely depends on the individual dog. I brought them in and they ran some blood tests - my dogs’ tests results have nothing out of the ordinary! The vet told me that neither dog exhibits evidence of kidney dysfunction and that there is no evidence that either dog has been affected by grapes. I am beyond relieved! Thank you for replying!