Lia does it a lot. Always has done it, since she was 2 months old. The vet told us not to worry because seemed a puppy thing. She is dewormed every three months.
Last saturday the obediance teacher said to me that if they drag their bottom is because they have a parasit or something that could not be eliminated with the worm pill that I'm giving to Lia.
The truth is that Lia does it but not a lot, maybe one or two times a week (that I see, but I spend a lot of time at home). Would you do a fecal test? I guess that if this is was a parasit Lia should do it more often? But if I don't do it i think I'm going to worry every time more.