Yes, you did. The principle is: if you care, leave them there.
Contrary to popular belief, cottontails do not dig their own burrows, as the European rabbit does. Cottontails use natural cavities or burrows excavated by woodchucks or other animals. Underground dens are used primarily in extremely cold or wet weather and to escape pursuit. Brush piles and other areas of cover are often adequate alternatives to burrows.
In spring and fall, rabbits use a grass or weed shelter called a “form.” The form is a nestlike cavity on the surface of the ground, usually made in dense cover. It gives the rabbit some protection from weather but is largely used for concealment. In summer, lush green growth provides both food and shelter, so there is little need for a form.
Resources: (online)
Cottontails
