The 24-year-old Oscar winner shopped heavily for her dog during her short stay for the Academy awards, reported the Daily Star.
"Adele really missed her dog during her six weeks in America. Every time she was out in Los Angeles she kept buying him little doggie accessories," the source said.
"She loves all the upmarket Hollywood pampered pet stores and couldn't believe how doggie-mad LA was. Adele spent hundreds on Louie, buying new clothes, collars, coats and scarves for him to wear in London," the source added.