Thank for all the advice.
I took them to the vat today, and I'm sad to say that one of them didn't make it. She was too sick and weak.
The other one, on the other hand, is OK. Getting stonger by the minute.
My other cats don't want to have anything to do with him! It's funny - they just go outside, hissss when the tiny one is too near, or hisss at me if his sent is too stong on me
I hope the little one will make it...
Again, thanks for the advice and support.
Much appreciated.