Treats for cat on urinary diet

[Wonderfulcheapfalafel]

Hi! Just wondering what treats I can give my cat at the moment. He's on a vet urinary diet to treat struvite crystals so I assume the usual dreamies etc are out. I'm having to sneak treats to the other cat at the moment so he doesn't get jealous. He's also quite annoying in between meals, acting all starving... A little snack usually shuts him up for a while, but not sure what I can give him?

https://www.vetsend.co.uk/trovet-multi-purpose-treats-mft-fish-cats
My brother's cat is on a renal diet, and has these.

Thank you! So bloody expensive all this specialist stuff! Does anyone know if plain chicken or tuna is okay?

I've had two cats on urinary diets and honestly, they just carried on having their usual treats. Probably not the recommended route to go down but neither of them ever had any further problems.