My mum was a very gentle person pre-dementia. Now she can be extremely difficult and unco-operative and says things like 'I'll punch you' or 'I'll spit in your face if you come near me'. This means that the other carer has to do all the work (she's double-handed). The agency have said that it's not possible to take this carer off the team as they have no replacement. How can I handle this? My mum can't take meds for this aggression and when I ask her why she behaves like this she has forgotten what she's done and said.