My dog has been scooting off and on for the past month or two...go to vet, get anal glands emptied. Potential infection two weeks ago so put on antibiotics, back on Friday to get checked now tablets are finished and get emptied again - no sign of infection. Great. 24 hours later and she is scooting again...what else can be going on? 4 year old female dog. Any advice welcome, suppose I'll be back to the vet again this week...