How to Choose a Cat Water Fountain
Most fountain complaints come down to four things: pump noise, filter cost, the material, and how easy it is to clean. Here's what to check before you buy.
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Cat Nutrition
Wet versus dry, portion sizes, and which human foods are safe — feeding guidance built around how cats actually eat.
Feeding a cat starts from one fact: cats are obligate carnivores, which the Cornell Feline Health Center explains means they rely on nutrients found only in animal products. Their natural diet is high in protein, moderate in fat and low in carbohydrate. The guides in this section build on that, using Cornell, AAFCO and the WSAVA nutrition guidelines as references.
The most common question is wet food vs. dry food, and the honest answer depends on the cat: its weight, how much it drinks, and any urinary or kidney history. Water comes up again in is my cat drinking more water than normal?, because a change in how much a cat drinks is worth raising with your vet, and in the guide to choosing a cat water fountain.
For portions, the cat food calculator estimates daily calories from your cat's weight and lifestyle. If your cat needs to lose weight, read how to help an overweight cat lose weight safely before cutting food, since Cornell warns that a sudden starvation diet puts cats at risk of hepatic lipidosis. Human foods toxic to cats covers what to keep off the counter.
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What "obligate carnivore" actually changes
The phrase gets used loosely, but it has specific consequences. Cats cannot make taurine in adequate amounts and must get it from animal tissue — a deficiency causes heart disease and blindness. They convert beta-carotene to vitamin A poorly and need preformed vitamin A from animal sources. They run a higher baseline protein requirement than dogs and will break down their own muscle to meet it if the diet falls short.
The practical upshot is that a cat cannot be fed like a small dog, and vegetarian diets for cats are a genuinely different proposition from vegetarian diets for dogs. It also explains why "complete and balanced" on a cat food label is doing more work than the same phrase on a dog food.
Water is the part of feline nutrition nobody thinks about
Cats descend from desert animals and evolved to extract most of their water from prey, which was roughly seventy percent moisture. Their thirst drive is correspondingly weak — a cat on dry food alone frequently does not drink enough to compensate, and runs mildly dehydrated as a baseline state.
That has downstream effects on urinary and kidney health, and it is the strongest single argument for including wet food. If dry food suits your household better, the counter-measures are worth taking seriously: multiple water stations away from the food bowl, wide shallow bowls that do not touch the whiskers, and for many cats a running fountain, which they will use far more readily than standing water.
The saucer of milk is a picture-book invention
Kittens produce lactase to digest their mother's milk and mostly stop after weaning, which leaves the average adult cat lactose intolerant. The milk is not toxic, but the undigested lactose ferments in the gut and produces exactly the results that implies. The cat will usually drink it enthusiastically, which is why the myth survives — enthusiasm is not tolerance.
The full picture on dairy has some nuance, and cat-specific lactose-free milks do exist. They are still calories with little nutritional purpose, though, and a treat that displaces balanced food in a small animal costs more than it looks like it does.