My friends cat brought a baby rabbit in the house. Don't know where the nest is. It's less than four weeks old. Eyes are closed. Don't know what to do with it. It will probably be too much to bring it to a shelter/vet. Any formula or hydrating/nutritious supliment I can make for it?

I have taken this quote from a post made in 2008 by 0rphen, it's very good advice, the thread is here:
https://www.askmehelpdesk.com/other-pets-animals/baby-wild-bunny-248399.html


Hi Myth... I taking this to be quite a baby. You can tell if it's been feeding by checking it's stomach, if it's sunken in then it needs to feed.
In the wild mothers usually feed at night or sometimes twice a day, if they cry constantly then it needs to feed, you can offer it regular goats milk, see how it gets on,if the bunny is a little older than a new born, say 3-4 weeks try offering hay such as... oats/timothy hay... dark green veggies... such as dandelion greens, you could also try carrot tops,parsley or grated carrot.
There is no need to introduce pellets.

Give him a check over, make sure he's comfortable and warm... but not to warm, it can be fatal.

You can speak to your nearest Humane Society or vet who will probably suggest a foster mother until he can feed properly, this doesn't take very long, at which point he will be introduced to the wild again.

I don't know whether you know but in some states it is against the law to keep wild rabbits.
So sadly he will be taken out of your hands.

Hope this helps

Bye fore now

Call a vet and see, they may know of a wildlife reserve where people who know how can care for it. Don't handle it often... It will stress it out.

Sadly I don't have much advice, Shazzy and Emily already gave wonderful advice, and that's the route I would take.

Are you sure it's a rabbit and not a hare?

The best bet would be to take it to a wilderness reserve. Baby animals are hard to care for at the best of times, rabbits and hares are not easy unless you know what you're doing.

Good luck.