The wet food is doing its job during meals. But between meals, cats need to drink voluntarily.
And they won't drink from bowls that smell like bacteria.
Bacterial biofilm forms on ceramic, plastic, and standard stainless steel within 24-48 hours. In microscopic scratches and pores invisible to the human eye.
You wash the bowl. You refill it with fresh water. The bacteria returns within hours.
Your cat approaches. Smells contamination. Walks away.
Not because wet food is hydrating them completely. Because their survival instinct won't let them drink contaminated water.
In the wild, cats evolved to avoid still water that harbors bacteria. That instinct doesn't disappear just because they eat wet food.
So wet food provides 60-90 minutes of hydration. And for the remaining 22+ hours, your cat is either:
1. Drinking inadequate amounts from a bowl they're tolerating but avoiding when possible
2. Refusing to drink entirely because contamination is too strong
Either scenario creates chronic dehydration that wet food can't compensate for.
Pet Food Companies Know This (But Don't Tell You)
I've attended veterinary conferences where wet food manufacturers present research.
They KNOW wet food improves kidney outcomes compared to dry food.
They KNOW the moisture content helps during digestion.
But they never address the 22-hour gap. They never explain that meal-based hydration isn't sufficient for 24-hour kidney function.
Because if they did, they'd have to admit wet food is only part of the solution.
And they're selling wet food, not water solutions.