KMR 2nd Step?

I mailed in my KMP labels about 2 weeks ago and today I got 3 14oz containers of KMR 2nd step. I thought it was going to be some sort of moist kibble or something, but it's powder.

I offered some to my kittens but they wouldn't touch it(I don't blame them, lol). Is this stuff even worth using? What should I do with it? I think I'll use my other label to get something else, lol. Maybe some bene-bac.

You could donate it to a shelter or rescue.

Well, I've already opened a tin, so I wanted to know if there was any way I could use it.

Also, I plan on fostering mroe kittens(hopefully) once these 2 have gone to their new home. So, I was thinking that, if it's good stuff, I'd keep it and use it later.