It is a common misconception that dogs are natural swimmers. There is no way to know how skilled the dog is at swimming. Dogs need to be slowly introduced to water and learn to understand how to interact with it. Here are some basic tips to introducing dogs to water.
Choose a quiet, shallow spot in the water.
Keep dogs on leash while they learn.
Get into the water with them.
Start at the edge of the water, and stay as long as they enjoy it.
If they don’t want to go, don’t force them in — especially if it’s a deep spot.
When the dog begins to paddle with their front legs, lift its hind legs to show them how to float.