How to handle my next client?

A couple days into a board I noticed my clients dog had fleas, I checked my dog right away and he had none. I notified my client and asked her if it would be okay if I gave her dog a flea bath, she apologized and said it would be great if I gave her dog a flea bath. I was able to get all of the fleas off. My problem is 3 days after this board is picked up I have another confirmed board for another client. Do I cancel my next board even though my dog is cleared of fleas and I flea treat and deep clean my house for my next board starts?