My 10 year old cat presently has a urinary tract infection which the vet is giving her antiobiotics and anti-inflammatories for. The vet advised to give her more canned cat food, less dry and obviously always have drinking water available. I seem to recall that with urinary tract problems you can help by having more or less of some minerals. Does anyone know what they are? This particular cat loves dry cat food, but I will try giving her more canned. However, I wonder if there is any dry cat food around that you can buy over the counter especially formulated for urinary problems, as I couldn't see any in our local pet shop earlier.

One of the biggest contributing factors of urinary tract problems is cats not drinking enough water. Hence ur vet suggesting wet food as opposed to dry.
U can get some dry foods with added cranberry to boost the acid leval of the urine and make it less alkaline.
U could have a word with ur vet regarding a vit c supplement in pill form or using a product (in capsule form) called urieaze by vetplus which helps maintain urinary tract health.
One of the best products to try is a drinking fountain for cats....it really does get them drinking more, most seem to pref drinking running water and if u can increase the hydration levels then the urine is much more dilliute and less urinary tract infections!