Q. Border collie, missing one square inch of hair on hind quarter, acting and eating well. No visual signs of damage. Should I be concerned?
DAVID ELBEZE, DVM, MRCVS
A. If you have not seen her biting the area, it could be an hormonal disorder, and that would be recommended to be checked.
If you saw her biting or nibbling the area, this could be fleas, mites or an allergic condition. In this case it might get worse if left untreated.
You can wait a few days and try to pay attention, try to see if the area stays the same, gets better or worse. Also pay attention if it bothers her at all.