Hi, Congrats on getting Ozzy! It's been awhile since Lulu (6 years) was a baby, but I still remember those days. We had an older cat, as well, and she had a bit of an adjustment getting used to having Lu around. They both seemed to tolerate each other for the most part, Lu (wanting to play), and Merg (wanting to investigate the situation but deciding to sleep instead). :) Here's wishing you the very best with both Ozzy and Maggie! :)