Question: Why doesn't my pet's happiness level go down?

So I was feeding my pet and giving him toys and things and I suddenly realised that his happiness hit 10/10. And then I thought ok, great I'll wait for tomorrow :D But tomorrow never came D: For some reason he now refuses to play with any toy or plushie. As in, his happiness bar is 10/10 happy. I'm not exactly sure if he's meant to be happy forever ever since I continuously gave him toys until he hit that bar, but now it can't go down. Apparently every toy I give him now is 'SO BORING' regardless of what rarity or type, or plushie and the like. He won't take it.

I guess it's kind of a good thing (then useless quest rewards will have some use besides stocking in my shop?) but at the same time I'm just a bit curious as to why my pet is eternally happy.

Thanks!

if your pet has a Minion, that minion will keep it amused. If your pet is in a resort, it is presumed that there are touristy attractions there that keep it amused. If your pet is fully amused then it will be too tired to play with you and will tell you your toy is boring.

If you want to play with your pet, you will need to take it out of where it's staying and remove its minion, both.

If you want to "make use of toys" then you can sell them, save them for use in quests, use them in treasure chests, or hoard them if/when Subeta adds a (much requested) "toys played with" feature.

Alright, thanks!