Older cat (about 13 years old) was always a bit over weight in her younger days but would say for the last 5 years has been on the skinnier side. She's become very skinny in the past couple of years but it's been a slow weight drop. She is however persistently hungry to the point of pestering all the time. Worming treatments are up to date and regular. Saw the vets a few months ago regarding a dodgy tooth and she didn't flag anything up.
In general she is fine, stays in most of the time now but I suspect that's because it's cold and there are some bigger, scarier cats on the block these days (have noticed she poops in the shrubs right by the front door so not even wandering off site these days). When the mood takes her she can be playful and kitten like.
Is it just old age or should I get her checked out?