BLUF: My 4 year old cat stopped drinking water from any source except stealing my cups.

Howdy all,
Have a pair of bonded girls. One is a 6-7 year old long hair and the other is 4~ year old standard short hair. They're both rescues. Recently the short hair stopped drinking from her water bowl. I purchased a water fountain to cycle water - I heard it was better for them - but she's too scared of it to drink from it, so it basically belongs to my long hair. Since then, she only drinks from water I've poured into cups. I've tried filling up the water bowl only with filtered water, colder water and room temperature water.

I wouldn't be worrying about it but she's become extremely vocal. She used to be very quiet and affectionate but now she walks underfoot meowing loudly if she sees me around.

I'm probably worrying about nothing but still, any advice could help.