Why tonight's rest matters for your 5 kg cat
Your cat's body is working hard to balance her sodium levels after the soy sauce exposure. The vet visit means she's already had professional care, but recovery isn't instant—her kidneys need time to process the salt. You'll likely notice her drinking more than usual tonight as her system flushes out the excess. This is normal, but she should still show interest in her surroundings between naps.
Set up a comfortable resting area with easy access to water, preferably in a quiet room without other pets. Avoid sudden movements or loud noises that might startle her while she's recovering. If she usually sleeps on high perches, temporarily block access—wobbly legs could mean a dangerous fall tonight.
The three key signs that mean trouble
While increased thirst is expected, refusal to drink is a red flag. Gently check her gums—they should feel moist, not sticky. If she turns away from water completely or vomits when trying to drink, her sodium levels may be spiking again. Time matters here: these signs typically appear within 2-4 hours if something's wrong.
Watch how she moves when she gets up. A cat recovering well will stretch and walk normally, if a bit slowly. Stumbling, circling, or seeming disoriented suggests neurological effects from salt imbalance. Any twitching or unusual eye movements also warrant an immediate callback to your vet—don't wait until morning.
Water management through the night
Offer fresh water in a wide, shallow bowl she can access without straining. Cats often prefer running water after illness—a dripping faucet or pet fountain may encourage drinking. Don't force water into her mouth, but you can dip your finger in it and let her lick if she's reluctant. Track roughly how much she drinks; a 5 kg cat normally needs about 250 ml daily—she may double that tonight.
Check the litter box for urine output. You should see several small clumps over the next 12 hours—complete absence or enormous volumes both indicate problems. If she hasn't urinated by midnight or produces alarmingly large amounts, contact your vet for guidance. They may ask you to monitor specific gravity if they provided test strips.
When to disturb her rest for checks
Every 2-3 hours, quietly observe her breathing and posture. Normal sleep involves curled positions with steady breaths—labored panting or sprawling awkwardly suggests distress. Resist picking her up unless necessary, but stroke her ear gently; it should feel warm, not hot. Cold ears plus lethargy could signal dropping blood pressure.
If she wakes naturally, assess her alertness. She should recognize you and respond to her name, even if tired. Blank staring, head pressing, or vocalizing strangely means her nervous system is affected. Keep lights dim to avoid overstimulation, but use a flashlight to check her pupils—uneven sizes or slow reactions need urgent attention.
The full verdict, portion guidance and serving notes are collected on the Soy sauce food facts page.