I have received a few reports of people having problems with expiring older, cached copies of the Build-a-Cat page.
This is actually a fairly common problem with sites which don't update all that often, so the following suggestions will work with all of them, not just Build-a-Cat ...
For most users, simply refreshing the page by hand will update to the latest version. The refresh button is usually a round arrow near the back and forward buttons at the top of your browser.
If that fails, try removing the page from your browser's history. Most browsers will allow this. Some may not. You could remove all history, but that's usually too drastic, and often loses things you'd rather keep. So, if you can't remove selected pages, or don't know how, skip this.
Some users sit behind "transparent proxies". This is common with mobile access and cable providers. Unfortunately, some providers, in a misguided attempt to reduce network traffic, intentionally mis-configure their web proxies. If the above steps don't get a fresh version of the page, you can usually force the proxy to ignore it's old cached version by adding a query to the URL. Simply change your bookmarks to add a ? to the end: as so
http://tad-carlucci.com/Build-a-Cat/? Please. however, only do this as a last resort since it will increase your network traffic by forcing a new fetch even when it's not needed.