Okay, so... I have The Sims 2 Ultimate Collection. I've got Custom Content for CAS, and CC for Buy Mode. I haven't checked out the CAS content, but the Buy Mode object definitely works. What I've been trying to do is put in a CC Pomeranian... but... I've had no luck. I put it into the Downloads folder, I put it into the Pet Breeds folder... I have the Pom CC in both of those folders. I'm kind of stumped here. Any thoughts?

Where is the download you got it from?

Are you sure they aren't sub-zip folders that are in there? Make sure you clearly read the page. Could you link me to it? Usually when a problem like this arises, it has to do with either requiring another mod. I've found that I accidentally put the whole zip in my downloads folder and raged trying to fix it. So make sure that isn't the reason, then check the page you downloaded it from. Lots of time it's just the matter of the files and where they specifically go especially when it comes to pets. Hope this helped!

Is it a Sims2pack file? In that case you have to install the file. The game only reads package files.

You might also want to go back to the download topic and read carefully if there are any install instructions.

It is a Sim 2 pack file and just double click on it after unzipping and it should install for you or get the Clean Installer to install it for you.

Thank you all for your responses <3