Canine Menopause

Factual Questions
1

Do dogs go through menopause? I have a six and a half year old Rottweiler that has not gone into heat for about a year. I am not sure if this is normal but I know that her previous heats were about six months apart.

2

Cecil answered this:
http://www.straightdope.com/columns/020920.html

3

From this site:

Irregular heat cycles are a sign of your dog’s age, LoneWolf, but not a menopause.