Updated September 25, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Quick answer: Kittens sleep a lot, often 16–20 hours a day, but they should be playful and eager to eat when awake. A kitten that is weak, floppy, not interested in food or play, cold, or hard to wake needs a vet the same day. Young kittens can become critically ill quickly from low blood sugar, dehydration, infections, or parasites.
Signs to watch
- Weakness or floppiness
- Not interested in food or play when awake
- Hiding
- Cold to the touch
- Pale gums
Common causes
- Low blood sugar from not eating enough
- Dehydration from diarrhea or vomiting
- Infections such as panleukopenia or respiratory infections
- Heavy flea or worm burdens causing anemia
- Fading kitten syndrome in very young kittens
- Hypothermia
Go to a vet or emergency clinic right away if
- Cold, limp, or unresponsive kitten
- Not eating for more than a few hours in young kittens
- Vomiting and diarrhea
- Pale gums or fast breathing
Safe home care while you arrange a visit
- Keep the kitten warm (a covered heating pad on low, with room to move away) on the way to the vet
- If the kitten is conscious and can swallow, a little corn syrup on the gums may help low blood sugar while you travel
What to avoid
- Waiting overnight
- Forcing food or liquid into a weak kitten
- Cow’s milk
Can you ask a vet online about this?
Online vet services can be helpful for deciding how urgent a problem is, getting general advice, and follow-up questions. But they have limits:
- A vet can’t examine your kitten, listen to the heart and lungs, or run tests over video
- In many US states, a vet must have examined your kitten in person before prescribing medication. Rules vary by state and are changing
- For any emergency sign listed above, go directly to an emergency clinic rather than waiting for an online reply
Have your kitten’s age, weight, medications, and photos or video of the problem ready to make any consultation more useful.
Sources
- Merck Veterinary Manual: Care of kittens
- Cornell Feline Health Center: Kitten care
- Merck Veterinary Manual: Feline panleukopenia
- Merck Veterinary Manual: Neonatal care of puppies and kittens
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.