S.O. wet dog food. Any recommendations?

[SmotherhoodandApplePie]

Ddog has struvites in a urnine sample yesterday. Vet said put him on S.O. wet food diet. He's been happy on Forthglade wet food (he'll eat anything though). Needs encouragement to drink so he has a fountain which seems to help.

Anyone had similar and found a good, but reasonably priced S.O. wet food ?
TYIA

S/O is royal canin terminology, I don't think you'll find other brands using it. I think they all have their own letters but not sure of the differences between them and whether they're interchangeable.

Thanks, I just did a quick search and other brands use the term 'renal' diet to mean the same thing.