When does a bichon tail curl?

Bichon Frise tails typically curl over the back when they are puppies, around 4-6 months old.

However, it's important to note that:

* Not all bichon tails curl. Some have straighter tails.

* The curl can be influenced by various factors: genetics, grooming, and even how the puppy is handled.

* The tail may not curl until the bichon is fully grown.

If you're concerned about your bichon's tail, consult with a veterinarian or experienced breeder. They can provide the best guidance for your individual dog.