New (or that we've only recently noticed!) feeds that might be suitable for horses with laminitis, ID or PPID:
Dengie Meadow Lite with Herbs
A low calorie blend of oat straw and meadow grass with DE of 5 MJ/kg, 3% sugar (ESC/simple sugars) and 0.5% starch as fed (but note the low protein at only 5% as fed). Can be added to bucket feed to encourage chewing and slow fast eaters, and used as a forage replacer [NB as this is a straw based product it will be particularly important to feed a good balancer to provide protein, minerals and vitamins, e.g. Spillers Lite + Lean, and with only 5% protein additional protein may be needed in addition to a balancer, depending on the quantities fed].
Baileys Natural Meadow Cobs
Can be used as a forage replacer for horses with poor or missing teeth (old horses, horses with EOTRH). Sugar and starch combined are a little high for horses with laminitis or insulin dysregulation, at 10% (7.8% sugar and 2.2% starch on an as fed basis so probably around 11.1% dry matter if the moisture content is around 10%), but the energy content is low for a grass-based product at 6 MJ/kg as fed (around 6.7 MJ/kg DM if the moisture content is around 10%). The cobs must be soaked before feeding.