We raise our puppies on a strict PUPPY IMPRINTING training method, some of which is:

Four weeks introduce a puppy litterbox, six weeks move litterbox outside petdoor, and eight weeks a handful of litter on the ground has puppy going to that spot for potty.

Twenty one days first bath and toenails, and every week after that.

Six weeks first car ride, eight weeks other pets including cats, all lead to a well adjusted new puppy.

You should have a plan in place to continue your cavalier puppies training process.