Hugs for Tiny! My only experience of cats staring at water but not drinking is CRF [kidney failure] Which I pray is not the case for you!
Get blood work. That is the best way to know. And if it is - please trying giving IV fluids at home, my B has lived five more healthy years.
Also give Pepcid 5mg every other day. And also syringe water orally. Both of these last ideas would be good to do anyway, can't hurt.
Hope Bogie is OK!!! I'll be thinking of you guys tomorrow.