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koi carp deseases

25 9:54:10

Question
one of my ghost koi & one of my japanese koi shake there heads as they swim they are still eating

Answer
I'm sorry that your koi may be ill.  Head shaking may indicate parasites that are making the fish itchy such as flukes.  If you can find a local koi club in your area, they will often come out and diagnose problems with your koi for free.  I hope you can find some local help.  It's really hard to diagnose problems via e-mail.  Good luck!