I don't think you should be forced to adopt a second pet at the start of the game as a part of the tutorial, especially if there aren't any there you want.

The tutorial is there to teach you how to use the feature's of the site and every part of the tutorial is important. You learned how to get a pet from the pound by picking up that second pet.

Just because you were forced to adopt one doesnt mean you are also forced to keep it. You can send it right back to the pound or sell it in the auctions once its timer is up if you dislike the pet.

All the tutorial really needs to do is just show you where to go and give you the option of adopting, once you get to the page in question it's pretty self explanatory with the little adopt button below the pets, you shouldn't have to adopt one to advance in the tutorial.

You will have to wait for at least 5 hours to continue the tutorial if you don't get an additional pet from the Pound. It doesn't look like an inspiring game start.