HELP Koi found dead
We have a small koi pond, 7 years- with 10 koi. Came home late afternoon to find three koi still alive out of pond gasping for air, bleeding. Threw back in pond, but they died. 8 killed in total. What animal are we dealing with that will take three out without eating them or taking them away? Three baby koi were eaten, one large one, but three large were left at the side of the pond. The possibilities are as follows: hawk, heron, fisher cat (weasel family), fox, domestic dogs or fox- all of which are in the neighborhood.
The four koi disappeared without any trace, the three others were left at the side of the pond. ANy thoughts or suggestions? We are so sad!!!!