Once kept OSBs. Very noisy at mealtimes - our neighbour a mile away across the valley always knew when we were taking stock to market because he heard them kicking up a racket at their earlier breakfast time. Vwery good meat - our local butcher tried one and asked for 5 a week! Give them plenty of straw to bed down in and make sure they've had access to water up to loading and they'll be fine for a couple of hours. I don't like small trailers in hot weather as there''s no air intake at the front or sides of the trailer. We once had someone bring in a sow for service by our hire boar on a very hot day (instead of waiting for evening, as we'd suggested) and she was so distressed we had to leave her in the trailer and sponge her down with tepid water for half an hour before she'd unload. That was not good stockmanship.