HI ! My 5 month old girl is always sniffling and licking the floor as she walks. She does this all the time and irritates me because sometimes she eats dust balls from the floor and starts coughing. Is this as stage? Will she grow out of it? I know it's not because she's hungry, she'll do it even right after her meal and not only around the kitchen. It's frustrating because when I walk her outside I have to be watching for anything she could eat from the floor. Any suggestions on how to terminate this habit? Thanks