I shaved Morty for the summer and it took about 6-8 weeks to grow back to the point that he looked like he did before we shaved him. I don't know if this makes a difference, but Morty's hair is the type that stops growing. Not like, for example, a Shih Tzu's hair that will grow until it touches the ground. We shaved him because he gets really really hot even in the winter.