Here's a couple of notes from 1998 by Ragnar about fish: Hello! About using fish as food for horses in Iceland it is not common but some farmers buy salted cutoffs from herring factories and give the outside going horses (a barrel they eat as they wish from!). We think this is very good for the horses, give them fat and lot of valuable ingredients and salt which many horses lack. Fish meal is not common to use as separate food but it is used in most or all feed-mixes we use. The quality of this fish meal is very variable - for cows and sheeps I have heard the "low quality" meal dried in fire burners is good(best) but today the most used meal is of a lot higher quality, dried with low temperature so most of the valuable ingredients are saved!
As you say salted herring(not red herring!) or actually it mainly is the offcut from the herring or capelin salted in barrels we use widely as food for sheep and horses! This is specially used for horses who go outside all the winter as a food supplement!! I would belive all kinds of fish was actual to use, but we seek for the fat fish like herring and capelin! I would never risk to give it fresh but as salted it is limited how much they can eat! Dried fish is far too expensive - at least the Icelandic one (40-50 $/kg!). The horses get a barrel to eat of - and while we used tree-barrels they often ate the barrel too! Regards, Ragnar ________________________ Judy