Which is the most cat litter 25L or 25 KG?

You can't compare 25L and 25KG directly. They are different units measuring different things:

* 25L refers to volume, meaning the amount of space the cat litter occupies.

* 25KG refers to weight, meaning how heavy the cat litter is.

To know which is "most" you need to consider what you're looking for:

* If you need more litter by volume, then a 25L bag would be more than a 25KG bag (assuming the density of the litter is the same).

* If you need more litter by weight, then a 25KG bag would be more than a 25L bag.

You need to check the specific product packaging to see how much volume a 25KG bag of cat litter occupies, or how much weight a 25L bag of cat litter has.