Glad to know he's being conned into the water treatment
Lexy is the same Tessa. She's on a mixture of a diet, a Royal Canin Urinary SO. She has a small amount of dry. I measure it with a little glass dessert dish I got from a Gu pudding
About half of that only for the whole day. I found it difficult to move her solely to wet only as she really loves her biscuits. So she gets a mostly wet diet. She won't touch the beef flavour of the Urinary SO pouches, so its just chicken.
I water it down a little bit, not by much, but as she's a grazer, she gets half a pouch in the morning and another half in the evening. Plenty of water around the house. I can't give her more right now as madam has a paunch to lose.
I don't give her these daily, maybe once a week if that, because they are packages for the retail market and I am not sure the salt content is that great, but its very liquid and Lexy literally slobbers it up, and that's Sheba domes, chicken flavour. I tend to stay away from any fish flavours since that's what we believe caused her stones before.
The supermarkets sell high meat content complimentary foods like feline fayre, waitrose and sainsburys. Most make a chicken or tuna flavour. Salmon is high in magnesium and a big contributor to stone formation so if you can avoid that it's a big help.
Gillian I never thought of a raw diet to help avoid this, so I might think about this for Lexy too.