You have to be careful if moistening kibble.
Here's something I copied and pasted from a reply of gmacs on another post.
There is a proviso on soaking kibble though - you need to check which preservatives are used. If the food contains citric acid, you should *not* pre-moisten it prior to feeding (doing so increases the risk of bloat by around 300% - and bloat is a condition that is frequently fatal. So a pretty darned good reason not to soak the food). There is no other known association between pre-moistening kibble and bloat, however, so if there is no citric acid in the food, it's down to pure individual choice.