
Steroids do increase thirst and therefore more pee.
I have just put my 15 year old spayed girl (done at 7 1/2) on Propalin, not having to do this with any previous spayed b8itch, but now has gotten to 15 before.
I only administer twice daily by vets advice, she is around 21kg so gets 0.5ml twice daily. I did find I had to space it out better and give it mid morning and last thing at night on a bit of toast.
When I tried morning and night I found the odd breakthrough so going 12 hourly works best for her.