I had never ever seen him drink before. I see Hardy drink often.
They are now served a quarter cup of dry twice a day with some snappy tom wet. It seems to be what they need. But Hardy has put on a lot of weight.
I follow instructions on the cat food bag.
Hardy is on a weight management diet but it does not seem to work at all.
After a month, he has GAINED weight I am pretty sure though we have yet to buy a scale.

UPDATE
I did a bit of cleaning: Emptying the sink and dishwasher. And the last night laundry is drying. I have to clean and empty the litter boxes to reload with new litter. Its been two weeks. Laurel is drinking again! He finally figured it out: no more toilet water for him!