Adding a stay to sit and down commands

Zachary is sitting to a count of 5 without any concern. The plan has always been to add the stay when we were able to get the count of five. We will start out with a count of one for the stay. Our previous West Highland Terrier would stay for many minutes at a time. We increased his stay time slowly over several months. We look forward to Zachary being able to follow the same pattern.