I
would advise looking into having a worm count and using a
product like Multiworm from Science with Nature, and some sort
of feed balancer (I use Top Spec). I would also suggest that you
contact Simple Systems feed company and ask their advice on your
particular horse’s nutritional needs.
When
worming my horses I use Multiworm from Science with Nature. In
an ideal world I also rotate my grazing with other stock such as
sheep and cattle, and rest every paddock for a six-week period
to interrupt the worm cycle.
Any
tips on keeping the weight on a 30year old TB x Welsh pony who's
not a big eater would be gratefully received. 
I
would advise looking into having a worm count and using a
product like Multiworm from Science with Nature, and some sort
of feed balancer (I use Top Spec). I would also suggest that you
contact Simple Systems feed company and ask their advice on your
particular horse’s nutritional needs. 
