Hi, my mother-in-law is in her eighties and is currently on DLA & SDA [Severe Disablement Allowance for a long time], we are trying to find out if she would be better off on Pension credit [would she?], her husband gets OAP Pension & a private pension, but my main concern is that if she was better off on Pension credit and applied for it would it then trigger her then having to re-apply for PIP or would her DLA be, ok and untouched? Thank you