Kristin Cavallari took a walk in her LA neighborhood today with her dog Bardot, but without her engagement ring. News broke this weekend that Kristin and her fiancé, Jay Cutler, broke up just a week after hosting an engagement party for family and friends. The reality star hasn't made any official comment on the split, but Kristin thanked her Twitter fans for their support in a message today, and hasn't been spotted wearing her ring since the reports surfaced. She and Jay seemed to be going strong just two weeks ago as they vacationed in Miami, where they lounged poolside, and where Jay sat front row to cheer Kristin on as she walked in a swimwear runway show. Kristin is reportedly coping with the change of their wedding plans by spending time among friends. She stepped out on Saturday night with a group for an evening out on the town, during which she was overheard filling in her fellow partygoers on her breakup from the star QB.