"Lisa" wrote in message
oups.com...
I have lost two butterfly koi in the last week.My other two koi are
doing well and have great appetites.There are no signs of injury or
disease in either fish.If anyone has a answer please let me know?

I have both regular Koi and butterfly Koi and have had no problems with
either. Check your water parameters. Also check for signs of disease or
paracites on your remaining fish.