I would imagine that cooking the fish/shrimp loses a lot of usable protein nutrition. Have you tried a dehydration approach? I think it might keep more of the proteins intact that way without denaturing them.
The fact that a protein has become denatured via heat, does not equate to the amino acids or fatty acids, being no longer bioavailable to a fish. Denatured simply means that the protein structure has changed, no different than what takes place with the amino acids when one poaches an egg.
I store mine in bins in my garage. they'll last 6-8 months but I only make about two months worth at a time.
As previously explained fatty acids will begin to oxidize, break down, and spoil, the moment that your food comes out of the oven. Sans preservatives in some form or another, the same thing will take place even when stored in a freezer. These DIY pellets will be going rancid long before 6 months rolls around.
I'd recommend sun drying or a dehydration method over baking. That way the food doesn't lose any nutritional value.
Again, as explained in your other thread certain nutrients will be lost, when you are using vitamins designed for human intake. As an example, very few species of fish found on this planet are capable of producing their own Vitamin C, so it is essential that it is supplied via the diet. Using vitamins such as Centrum, Vita-Chem, etc that contain basic ascorbic acid will not hold up well to any form of heat, nor will they hold up during storage. They will begin to degrade from the moment that they are exposed to moisture, heat, and/or oxygen.
Also, most of the carnivorous/predatory type species do not produce the correct enzymes in significant amounts (such as amylase) to properly assimilate starch/flour. With those species starch must be used in limited quantities (not 25%) or it will definitely effect the overall digestibility of the feed.
There are workarounds to this & other problems that could arise with home made foods. Should you be interested, I could elaborate.
Hi, may i know what is the function of adding garlic powder/ garlic in the fish food? Thanks!
Below is a past discussion that I started with regards to using garlic in fish feed.
http://www.monsterfishkeepers.com/forums/showthread.php?458994-Garlic-and-the-Prevention-of-Disease