Sherry did obedience since I took her to lessons as a puppy, and did competitive obedience from when she was about 8 months old.
We started first in the very easy classes, and did quite well, so I was bitten by the competition bug, and we continued.
Of course I didn't know how to train her very well, and we have both learned a huge amount in the years since then!
She has now been retired from obedience to concentrate on agility, as that's what she likes most!
Sure, she knocks the occasional hurdle, but she has lots of fun on the way!