I saw your post in another thread about having a "dog of honor". We had our dog walk down the aisle as the ring bearer & it's one of my favorite parts of the wedding. My hubby was so scared that she was going to act up & start jumping on people halfway down the aisle, but she was a perfect angel. She even sat all the way through the ceremony without making a peep!
Basically, I just want to say, go for it! Some people might look at you a little crazy, but it's totally worth it.
Here she is coming down the aisle with one of my brothers.