The answer to this question is not a simple ‘yes’ or ‘no’. It depends on the reason that I have been asked. Let me give you some general rules to follow if your intention is take a kitten from an adult cat who has never had kittens of her own, and get her to accept them as part of the family. This applies only when the adult cat doesn’t have any known health problems which could make it impossible for her to produce kittens in a normal way, such as a urinary tract infection. If she does have one or more of these conditions, then there are other things you will need to do first before taking kittens from an adult female cat.
1) The kitten(s) must be very young at least 8 weeks old (for example they must weigh 1 ounce / 25 grams or less). You can’t take them from an older cat whose behaviour may change with age – e.g., becoming testy towards humans and perhaps even aggressive toward you – unless she’s been tested by two vets for FIV/FeLV and given clean bill of health both times!
2) The mother cats urine should be sterile: no traces whatsoever of any bacteria in it. Her litter box should also be completely disinfected after each use so that no trace whatsoever remains once the kitten(s) are removed from their nest box(es). Use bleach diluted 1:10 (i.e., 10 ml per 10 litres / 4 gallons), etc..