Not necessarily if it happened suddenly but certainly smell and taste are essential components in encouraging eating correctly. Smell as a warning that food is edible and taste to allow someone to actually want to eat.
Maybe a factor to consider, maybe you could send an e-mail to the Stroke Association? R her 'meals' on the NHS?
She did consider getting the prescribed meals to help her, but she didn't pursue it. I wonder if it could be more her taste, she did say things tasted metallic when she was in hospital. I'll send an email through to them, I actually emailed them for some support after it and they were wonderful. We also got her urine results back from hospital, and there's no infection there. Now where on earth could it be?
She's phoned up the ward where she'll be having her scan to confirm her appointment, and I also told her she could probably get her in earlier if anyone cancelled. We're waiting on a call back.