I'm so sorry to hear that, my impression was that all the seahorse's shipping from seahorsesource.com leave eating frozen mysis. I know when talking to Abbie she insisted that I use the same Mysis, Hikari, so I had to order some to be shipped since none of my LFS carry it. I don't know if that's what you were using but maybe that might be an issue. Also she suggested that if they aren't eating to soak the mysis in garlic oil, I used Seachem garlic guard. Also they do really eat slow so I've been feeding a lot with pumps on and off - I've settled on keeping them on, it keeps the mysis in the water column longer. I now just keep the pumps on, add some LRS frozen to let my cardinals gorge on and that leaves mysis for the ponies. Anyway hope some of this helps.Mine actually came from SHsource.com also. One lasted a week, second lasted 2 weeks, last one has been 5 weeks so far and JUST TONITE ate some frozen I had mixed w/brine! So, I'm very hopeful