Pamela.
I don't agree that your listed interests (children, pets/pet's health, herbal/natural health, etc.) are not popular. People are searching for these topics all the time. (You can find out the exact number of searches on a keyword by using the free google keyword tool.) However, you need to get exposure for your particular blog. . . You can do this in a number of ways. You've already gotten off to a good start by joining this forum -- you can use the signature of your posts here to link to your blog. Also, have you tried writing and submitting articles on your interests to an article directory such as EzineArticles.com? People, myself included, are always looking for good information. The way that the articles you write gives your blog exposure is that you can post a link to your blog in the Resource Box of each informational article you submit. Best of all, this whole process is free, requiring only some time and dedication to write good articles. I'm just getting started with this, but it looks promising. I hope that you find this information helpful.
Kazuo
science teacher
West Burke, Vermont