Once they start marking it is difficult if not impossible to stop. Neutering may or may not succeed especially with an unaltered female in the house.
There are a gambit of health issues in unaltered dogs. Females are prone to mammery cancer and pyrometra. Pyrometra is often times fatal.
__________________ Deb, Reese, Reggie, Frazier, Libby, Sidney, & Bodie |