It might not matter the surgery your dog has had. He's going to need the surgical area cleaned and bathed at some point during his healing process. You will need to take special care of how you maneuver your dog through any washing post-surgery, and you'll need to take special care of the surgical incision area as well. Your veterinarian may leave you with instructions on how to bathe your dog after his surgery, but there are some key points to remember for grooming purposes when bathing a dog post-surgery.
Whether you are bathing your dog or not, he may be a little groggy or sleepy depending on post-surgical medication he is on. He may also not want to be touched and other areas of his body outside of the surgical incision could also be sore and tender to the touch.
This is a time where your dog needs lots of tender care. Be gentle and a doggone good caregiver after your pup has had any kind of surgery. Caring for him with a nice gentle bath is a great way to show him puppy love, but wait until he is cleared to get wet before giving him a full bath.