Beagles are wonderful dogs and on average have the intellect of a 9 year old human. Unfortunately they are a nose and stomach with 4 feet. The only downside to them is that they are very food driven. As in they would truly eat themselves to death if given the chance. They are the ultimate pack animal which is why they make such wonderful pets because they adopt you as part of their pack. I suspect that you are correct in that you changed the pack dynamic in your home and she’s out of sorts. Unfortunately they are so food driven, they were bred for chasing down food after all, they are ridiculous if ever started on human food. Best just to cut off their crack and let her begin the withdrawal process. She’ll still love you but hate you for it.