I give mine cat milk as a bribe for medication - I tried the lactofree stuff once because I happened to spot it... It'd be way better for what you want it for than cat milk a it's the consistency of normal milk rather than thick and gloopy like cat milk.
Yes it's to up fluid levels, the cats drink water but as they were very ill it was to up fluid levels quickly. Thanks for suggesting lacto free. I had considered it but wasn't sure as I didn't want to worsen things. When we run out of cat milk I'll definately try lacto free. Thanks again.
Goats milk isn't lactose free, sorry if looks like I was suggesting it was but it is often tolerated as well as lacto free cows milk due to the compositional difference- depends on your cat, depends on supermarket availability. Tbh I haven't heard of recommending cat milk in cases like this - usually it water, fountain or food, but cat milk is an expensive way to do it.
Is just a case of a guaranteed way to up their fluid intake?
In which case cheaper to by litre bottles of goats milk. Similar ph, lower fat/sugar content. Cat milk is a right rip off and lacto free human alternatives are much cheaper. Also good for mixing cystaid in with if they aren't cock a hoop with capsules. Imo ofc.