"Bloat is very rare on grass-legume pastures when legumes constitute 50% or less of the available forage. "
http://overton.tamu.edu/clover/cool/utilization.htm Everything in moderation. Legumes are an important feed stuff for high producing
dairy animals particularly alfalfa. I of course have no direct
experience with austrian pea but I would be willing to give it a shot. I want to clarify a bit, I don't want to make people shy away from legumes and end up turning to grain in an effort to increase production or maintain condition, which is sooooo much worse. Some are a little more prone to cause bloat than others, alfalfa is one of them that is considered high risk but there are an awful lot of cows and goats that rely on alfalfa. If you have seen
many a bloated animal than I would suspect there is something going on managment wise in addition to a legume forage. unless somebody is turning their animals out on nothing legume pasture or not allowing the rumen enough time to develop the ability to handle it. I feed dry alfalfa pellets which greatly reduces the chance of frothy bloat. there are all sorts of rules out there about how mcuh grain needs to be fed for
milk production. my girl gives 3/4 - 1 gallon a day on 4lbs of alfalfa pellets and grass only and looks great!
It is important to note also to people new to goats that they naturally have the ability to consume large amounts of forage in a short period of time. Their rumen expands to accomodate it. Many people think that their goat is bloated when they just have a full rumen because of the amazing difference in size that can occur in a few short hours. Bloat is accompanied by serious distress, crying, thrashing etc. I'm not saying that this is neccessarily the case with the animals you have seen bloated but it often is with new owners who let their goats out to graze and panic when they come back in looking like they swallowed a beach ball
I had a goat that could fit through the
fence in the morning and would gorge herself on honeysuckle and than couldn't get back in! she was happy as a clam and not bloated just "enlarged". brat.