The dry rule comes before the dirty coat
Stitches and surgical wounds need to stay dry because soaking softens healing skin, loosens the seal the wound edges are forming and carries bacteria from bathwater straight into a site that cannot defend itself yet. A smelly or muddy dog is unpleasant; a wet, infected incision is a second operation risk. So the starting answer for the whole healing period is simple: no immersion, no shower spray, no swimming, and no hosing down in the garden until your vet has seen the wound and lifted the restriction.
Spot-cleaning the parts that actually need it
Most post-surgical dogs do not need their whole body washed; they need specific patches dealt with. Muddy paws can be wiped one at a time with a cloth dampened in plain warm water, then patted fully dry. A soiled rear end after a wobbly post-anaesthetic toilet trip cleans up the same way, using a fresh cloth and staying several inches clear of any abdominal or hindquarter incision. For a general stale smell, a dry rub-down with a clean towel and a gentle brush-out of loose hair freshens the coat surprisingly well without a drop of water near the wound.
Never apply creams, sprays, dry shampoo powders or scented wipes near the incision unless your vet has specifically said that product is allowed there — residues migrating into the wound are a common, avoidable problem.
If a real wash of one area is unavoidable
Sometimes a dog comes home plastered in something that cannot wait. Before any water touches him, ring the clinic and describe it; they may prefer to clean him themselves, or they may approve a targeted wash. If they do approve one, shield the wound first with the covering method they describe, wash only the affected area away from the incision with the water directed away from it, and uncover and inspect the site immediately afterwards. If the dressing or wound got wet despite your care, tell the clinic the same day rather than hoping it dries out fine.
Do not rely on household plastic wrap tricks you have seen online unless your vet endorses the method for this wound — a covering that traps moisture against stitches can do as much harm as the bath itself.
Keeping him comfortable until bath day returns
A dog who cannot be bathed still needs his normal hygiene in dry form. Brush him gently a few times a week, avoiding any pull near the incision, and check the skin under his collar and harness daily for rubs or dampness. Wash his bedding frequently — a clean bed does more for how he smells than a risky bath — and wipe his feet after wet-weather toilet trips so damp does not track onto that bedding. Trim no hair around the wound yourself; if the site looks matted or weepy, that is a finding for the vet, not a grooming task.
Warning signs that outrank cleanliness
Contact your vet promptly if the incision becomes red, swollen, hot or gaping, if there is discharge or a new smell coming from the wound itself rather than the coat, if stitches come out, or if he is off his food, lethargic or running a feverish, shivery spell. Those signs mean the wound needs eyes on it, and no cleaning routine at home substitutes.
When your vet finally clears bathing, start with a short, lukewarm bath and a thorough gentle dry around the healed site. Keeping the clinic's wound instructions in KinsLe Pet Passport means the dry rule, the recheck outcome and the day bathing was cleared all sit in one records packet anyone caring for him can open.