My water lilies are blooming!  We are also down one koi.....not naming names, Luna!!  I think the koi were spawning - they were crazy jumping in the pond and the water was frothy and bubbly....and either one jumped out of the pond onto the lawn, or the dogs managed to grab one, but the results were the same - one koi gone.  Since I still have 6 koi, I'm not replacing it - which is a good thing.  The koi the size of mine cost $400 at Sunset Koi!!!  The dogs owe me big time!  I also invested in "shock collars" for them and set up a boundary by the pond.