Can you share your designs of your scale? What I want is a scale that I can put under the cat food or water bowl (or under the cat litter tray), so that I can

Can you share your designs of your scale? What I want is a scale that I can put under the cat food or water bowl (or under the cat litter tray), so that I can measure on a minute-by-minute basis how much water was drunk, how much food was eaten, or how much poop or pee was generated, and see those trends over a long period of time. Cats are really good about hiding weakness and illness, and we've found that frequently one of the best indicators of health issues is a significant change in the intake and output processes. You could then follow that up with a bigger scale you can put under the food/water bowl area, so that the cat ends up weighing themselves, every time they go to the bowls. But I want these things recording this data locally, making it available locally, and not sharing it with any facility that is outside of my home.