I've only had my goats (oberhasli/ alpine) for a couple of weeks and so far so good. We've been working on fencing, but now I'm starting to worry about our barn. I know goats need good ventilation and clean bedding so they don't breath in amonia. Our goats spend all day outside and I do a clean sweep of the barn each day so right now it's not a problem but I'm worried about this winter. For one thing, what is the difference between drafts and ventilation? we have a really old barn and I'm sure the wind goes right through it, is that bad or good? As for the bedding, we have concrete floors so I want to let the bedding build up this winter to give them some warmth but wont the amonia also build up?