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I think if we humans can eat boiled clams and or seafood it must be sterile enough for ducks. Right?

Hmm. I heard somewhere that it is really unreliable because some brands have additives that are very harmful to the health of birds. And also heavy metals.

Here where I live ground-up oyster shells are hard to come by. And 5 times the average price in the states. I have been hand grinding clamshells for the ducks, although the clamshells have been baking in the sun for a few months so I guess they're sterilized. Could I boil the sea snail shells...

Hi guys I have a question. Recently I've searched for calcium sources. I've been using egg shells, clam shells, oyster shells. But I still think I don't have a reliable source. I when to the beach today and found a ton of sea snail shells. Ive brought them home and am wondering if I can crush...