I don't think they "outgrow" the desire to be outside. My Maine Coon is 10 years old and still tries to escape everytime she's near when someone opens the door!
Unfortunately recently Penney got out and was *very fast* about her getaway. She must've been planning it for a while because it was like she knew exactly how to get around me and out the door! lol I tried going after her but she was off and running, and we didn't see her again until the next day... And she didn't come home alone.
It took us about a week to discover the very unpleasant existence of fleas that were on her... and she was kind enough to share with her doggie brothers!
And this was how I found out that particular brand of flea control doesn't work! I've learned my lesson: Don't try to save money with flea & tick treatments! UGH!!! (I always use preventative flea treatments because even tho Penney stays indoors -or, at least, she's supposed to!- our dogs go out daily for walks, etc.)
It was finally safe for me to apply another flea treatment on her, and this time I went with Frontline Plus for Cats. That stuff worked great! By the very next day after applying it, she had no more fleas on her body, thank goodness!
Her skin is so sensitive to flea bites and she lost some patches of hair from the damn stupid little pests. I felt horrible for her, but they strongly suggest you do not apply another flea treatment too early. I guess they don't want you to overdose your pet?
Anyway, Penney is now on the mend, her skin is healing up nicely and she's definitely much happier. But I bet this won't stop her from trying to escape again! 😆
My plan is to take out the giant dog crate we have and set it up on our deck so she can enjoy the fresh air and sunshine but will remain with us!
I figure giving her about an hour or so everyday might be something she'll enjoy, and our deck is up very high, so predators won't be coming to try to get her, and fleas are unlikely that far up off the ground.
Plus, it's right off our kitchen, which is occupied very very often between all the family members, so she won't be left alone anyway. Fingers crossed this helps her to accept that staying indoors is definitely safer for her and that I'm not being mean by not letting her out! lol
I look forward to reading what others have to say on this subject.