No, domestic or feral cats do not abandon their pre-weaned kittens if you touch them. Although they will probably become anxious . A feral cat mother might move her kittens to a new den if you touch them. A domestic cat, in a nice warm home, might become anxious if you touch kittens. It is best to leave them alone but watch. Noise and activities near them might also make them anxious. They need quiet dens. Yes, newborn kittens do not have teeth but rarely they might have. Incisors are the first teeth to appear and about 2 to 3 weeks of age. Photo in public domain and words added by MikeB. However, I think that you will see cat breeders touching newborn and young kittens quite often in order to check for their health. The mother probably finds this acceptable because she will be a full-time breeding mother and used to the whole process. On a grizzly note, I feel too that some breeders will kill newborn kittens if they are not up to scratch on appearance. Appearance is all for breeders....