Help please

[howdy20012002]

Hello all
I purchases some CB seahorses a few weeks back and noticed that 3 of the 6 are becoming very skinny
Apparently they have depleted the tanks copepods and are now hungry but aren't eating the frozen mysis shrimp.
I am becoming quite worried they aren't going to make it
I have to leave town till sunday night and my dad is feeding them till then.
However, if they are still alive when I get back, if anyone has any source of copepods I will buy them from you
IF anyone even has chaeto that would be great...cuz normally it is covered in copepods....
Any suggestions will be greatly appreciated as well as to how I can get these guys to eat frozen
Apparently the supplier had a constant supply of copepods and didn't train them to eat frozen.
Any and all help will be greatly appreciated.
thanks
Neal