Hi, my Mum lost her 15 year old dog a few months ago and her mental health seems to be suffering since. I'm getting worried about her. She seems hyper focused with finding out what caused the cancer ddog died from. She can't seem to understand or accept that he was of quite an advanced age and probably wouldn't have lived much longer anyway, had he not got cancer. This overthinking has started her going off on rants about vaccines and how they are to blame for everything. She still cries every day re ddog. She can't focus on anything and her conversations are hard to dollow as she goes into tangeants. Everything is directed back to this. She's very agitated when rambling. Is this normal or do you think she is suffering with her mental health?