One trick I've used is to go to the Flea Market and load the first page of pups, find the highest number, and use that as a starting point in demo.
Alternatively, if you've just birthed a litter in the past hour or so, start with your own pup's number and go up from there in the demo.
Finally, you can load one of your own wolves pages and just type in the new number at the end of the link string in the browser bar - that will take you to the wolf's page. So you would take your wolf, say https://www.lorwolf.com/Play/WolfDetails?id=89849 and change it to https://www.lorwolf.com/Play/WolfDetails?id=130192, 3, 4, 5, 6 etc. if you actually want to see who has the wolf in their den. (Although we're over 130980 by now and still growing exponentially)