Barbie Pets Series 13

I'm not sure how these cute pets caught my eye, as I've never paid attention to Barbie pets before, but I popped a couple in my Target order. 

Each suitcase has two pets and a checklist. 

I've never gotten these before, so I have no idea if the codes mean anything.

Both of mine had the same 0924KF01 beginning to the code, then the last two digits were separated. 

Brown dog/black & white cat: 18

Chihuahua/bird: 38

PHOTO CREDIT: Mine.