Thank you!
I tried clearing Origin's cache and that didn't get all my expansion packs back. So I uninstalled Sims 3 and all expansion packs, uninstalled Origin, rebooted the computer, deleted c:\ProgramData\Origin, rebooted the computer, reinstalled Origin, and now I'm letting it re-download The Sims 3 and all of its expansion packs that I own. Pets is in that list. I'll post back whether it works or not tomorrow.
@paulbarbee What you are paying for is a license to use the software (the activation code). There are third party that are obtaining and reselling codes and are not authorized to sell just the codes (license). If you buy a code from an unauthorized third party vendor you will have to return to that vendor and get a refund or a valid working code. Ebay is like a flea market - you have to be careful what you buy. Many Ebay vendors are reputable but I have been burned a few times. Working with these vendor's support people can be a challenge. I have had some success with paypal or the bank card to recover from a bad purchase.
