I just returned from a very long hiatus. And I have this item in my inventory. What...what does it do? I don't want to waste it on a pet only to find out it was valuable, or not.

It's a non-tradeable item, so it doesn't really have any sP value. It's a food and stat booster, so you can feed it to one of your pets or use it on them to gain a few stats.

Or you can just delete it if you don't want to do either of those things.

That would make sense. I had a few other stat boosters. Though it was like a colour potion thing. Oh well. Time to use it.

Thank you for the help!

It can gain you 1-3 health on a pet that's tier 1, 2 or 3, but can be fed to a pet in any tier.