A companion dog, not a water dog
Some Bichon Frises like swimming in a mild, paddling-pool sense; very few are natural, confident swimmers, and many would rather watch from a towel. The Bichon is a companion breed, developed to be charming company on laps and in palaces and later as a performing dog — not to work in water. There is no retrieving heritage pushing a Bichon into a lake, so his attitude to swimming is mostly about personality and early experience: a bold, well-socialised Bichon introduced kindly to shallow water often enjoys splashing about, while a shy one may find deep water genuinely frightening.
The owner's job is to make it a choice. A Bichon who can walk into water that reaches his belly, paddle a few strokes to a person he trusts, and walk out again has had a good swim. A Bichon carried out and released in deep water has had an ordeal, and will remember it.
Size changes the safety maths
Everything about water risk scales up for a dog this small. A Bichon tires quickly, loses body heat fast in cold water, and can be knocked off his feet by a wave or current that a larger dog would not notice. Fit a properly sized life vest even for paddling sessions — it keeps a small dog level in the water instead of tipping head-down, and the handle lets you lift him out instantly. Stay within arm's reach at all times, choose still, warm, shallow water such as a paddling pool, a dog swim pool or the quiet edge of a lake, and keep sessions to a few minutes.
Swimming pools need extra caution: a Bichon who falls into a garden pool may not be able to climb out at the edge, so pools must be fenced or covered when he is outside, without exception.
The coat after the swim
The Bichon's fluffy white coat is the hidden cost of swimming. That soft, cotton-like texture tangles as it wets and mats hard as it dries, especially behind the ears, under the collar and in the armpits. Rinse the coat in clean water after any swim to remove lake residue, sand or pool chemicals, then dry and comb through fully while the coat is still damp — leaving a wet Bichon to air-dry in a tangle guarantees a painful grooming session or a short clip to remove mats later. Owners who swim their Bichon regularly often keep the coat in a shorter trim through summer to make this routine manageable.
Making it fun at Bichon scale
Start in a shallow paddling pool on a warm day, with you sitting in it. Let the Bichon paddle to you for praise, play with a floating toy at the edge, and finish while he is still cheerful. Repeat over several days before trying any natural water. Some Bichons graduate to loving these sessions; others decide the pool edge is their limit, and that answer deserves respect — a companion breed's swim is recreation, not a requirement. Sharing which way your dog voted helps anyone else who cares for him, and KinsLe Family Sharing keeps that preference on your Bichon's profile for family and helpers to see.