During the estrus or heat stage of her estrus cycle, her urine contains pheromones and hormones, both of which signal her reproductive state to other dogs. This is the reason that dogs in heat will attract other dogs, particularly males.
smock. 1  a loose, lightweight overgarment worn to protect the clothing while working. 2  to clothe in a smock. 3  to draw (a fabric) by needlework into a honeycomb pattern with diamond-shaped recesses.
Smocking (or shirring) gathers your fabric in order to give it stretch. Historically created with thread, it is most commonly used in clothing such as dresses and blouses. However, when using your machine you use elastic for a fast and easy result. This technique is set up in a very similar way to couching.