| Paul,
I would imagine that part of it is that the big koi get better handling. I would want one to a box on big expensive koi. Sometimes the smaller koi get over-crowded and ammonia problems can compound in the bags. I know they can sometimes develop ulcers as well after arriving ok. I a took a beating on some small Japanese koi I bought from a US dealer. He explained they are used to a somewhat different bacteria in the biological filter. He suggested not feeding them for a few days after arrival. They dropped like flies for a few weeks and I lost about 75 out of 100. I too have seen the small fellows fall over dead when trying to catch and move them.
Mitch |