Fear, boredom, mating instincts, or curiosity about a smell from far away can tempt any dog to go roaming.
Without plenty of exercise and regular walks, they may escape and get into danger.
Corangamite Shire Council is calling on dog owners to make sure their pets are restrained in a properly fenced area and suitably cared for so they don't stray.
Ranger Daniel Boyle said dogs need regular socialisation with people and other animals to keep them physically and mentally healthy.
"Keeping your dog contained is the best way to keep him or her safe from hazards, like traffic and fights with other dogs."
Mr Boyle said Council had picked up 15 stray dogs so far this year.
"We have had 38 calls about straying/wandering dogs this year during office hours and an extra 50-plus after hours.
"Any dog - regardless of breed, size, or if it's usually friendly - can be aggressive when defending its territory.
"Most dog attacks in public places occur on the footpath or road in front of the attacking dog's property.
"There have been more than 10 attacks this year from wandering dogs, either on other dogs, humans or livestock.
"Rangers are available 24/7 to respond to dog attacks so, if one happens, please call us straight away on 5593 7100 and you will be diverted to the on-call officer.
Mr Boyle said keeping dogs confined reduces dog droppings in public areas creating a healthier and more enjoyable environment for everyone.
He reminded owners that all dogs and cats must be registered and microchipped so they can be returned home as soon as possible if they do get out.
"Under the Domestic Animals Act 1994, owners must ensure that their dog is securely confined to their premises. If a dog is found wandering, Council can fine the owner over $300 and hold the dog at a pound, at the owner's cost, until works are done to confine the dog."
