A Tablespoon or Two of Fat Free Cottage Cheese or a small piece of cooked chicken will usually stimulate an appetite, just like if you have a bite of something, it usually stimulates a human appetite. Occasionally one of my Yorkies will not eat for a day or so, he (unlike my female who is a free feeder and just picks a few bites off and on during the day) will eat twice a day, usually when my husband and I do. I know when there is a change in our home, or when we travel, he will take about 36 hours to chow...........go figure? The vet says don't worry, some furbabies just take a break from food occasionally.