Other thing is.....our Maine Coon had bladder crystals at about 15 wks old and has been on a dry diet ever since (as recommended by vet). I'm going to ask the vet about changing his diet.

Anyone with experience of diet & crystals?

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2 Maine Coon x, 1 Pixie Bob + 1 Norwegian Forest + 1 Tarantula !

R.I.P. Darling Jackson 11/7/09 - 15/1/10
Black Norwegian - died under anaesthetic for neutering
R.I.P. - TC - Black & White Moggie
R.I.P. - Pepsi - White & Black Moggie
R.I.P. - Micky - Little Yorkie
R.I.P. - Buddy - Chihuaha Cross
R.I.P. - Sunny Hill Lad - Arabian