Hi, we have 2 six month old female kittens living with us, along with their mum. Today mum has given birth to 4 new kittens. The kittens are safe in a cupboard upstairs and mum is keeping a close eye on them. However mum is now acting strangely towards the older kittens and it looks as though she is attempting to grab them by the scruff of the neck, (she has not bothered with the older kittens since they were about 10 weeks old) we are concerned that mum cat is confused and thinks that the two older kittens should belong in the cupboard with the new litter. Have had a look on the Internet but struggling to find anything in this topic. Any help or advise will be most welcome. Thanks