Stella and chewy's are an excellent FDR. Yes, you will notice almost as much of a change going to this from kibble as you would have from a cheaper to a high quality kibble. Dried they can be mixed. Rehydrated(which is how it should be fed), it needs to be separated. Biggest draw back to FDR is the cost. It is the most expensive way to feed your ferrets.
Ferrets: Contessa Kitties: Watson, Oskar DIP Sinnead, Vincent, Boris, Zeus and Athena, Willow, Mr. Frodo, Indie, Lucrezia, Judge, Odin, Miss Emily, Suki, Cody, Aristotle, Butterscotch, Frankenfurter. RIP Herne, Ligeia, and Mr. Stubbs