As far as dry only diet is concerned, there are plenty of people that feed that way, but I personally would not.

The main reason why I don't advice it, is because it can be hard to make sure your cat gets enough fluid when on a dry only diet, where as wet food is about 80% moisture so it it not a problem.

A lack of fluids can lead to urinary tract and kidney infections, and when you start going down that slope it is hard to get back up.

Also, one of the common reasons for feeding dry only is because it apparently helps keep their teeth clean. Although some vets are still saying this, I have read many reports that this is not the case at all and in fact certain brands of wet food are much better for teeth.

I'm sure others will have some further advice, and hopefully an 'all dry' feeder will be able to give a few reasons to feed all dry so you can make an informed decision.