Hi All,
Right, just spoken to the vets, and the extra tests have showed that Max's wee is slightly dilute, and perhaps with a trace of protein as well.
They reckon this is the early signs of kidney issues (not uncommon I'm told for a cat this age?), and that we need to get him on a low protein diet. They're putting some different types of food out for me tonight, wet and dry renal foods as Max tends to eat both, and we're to do more blood tests in 2-3 months time to see if the levels have reduced following the diet change.
This is all we need to do for now, they don't think tables are necessary yet, as its only very early stages and its been caught early.
I'm just so glad I went with my instincts to get him checked as I was sure I'd seen him drinking a bit more than usual. I guess nobody knows their cat better than a slave