After you feed your dog you should wait at least 60 minutes which is an hour to avoid the dog developing bloating.
If you walk your dog sooner than an hour after feeding them then the dog can develop bloat so allow enough time for the dog to digest their food before walking them.
Also if you haven't fed the dog yet before walking them then you should wait 30 minutes after you walk the dog before feeding them.
But you can feed your dog and then walk the dog an hour after feeding them and they should not get bloated.