We are new to chicken raising and recently I ran into a blog entry that discourages ACV during high heat because it "affects laying hens by making the calcium in her feed a little less digestible". They say to use baking soda instead.
http://www.the-chicken-chick.c...

Do you think this would be the case for wild birds? They have overall a different diet, so this may not be a concern. I just want to make sure because this sounds like a great idea. We put out egg shells in the spring because we learned some birds will eat them to increase their calcium intake for egg laying.

I bet your local county extension agency would be able to answer that question. They would be my first place to go, because of the knowledge level there.

I agree Mary. This tip is just about keeping algae out of a bird bath, and nothing more.

Thank you. I tend to be very cautious about the wild birds when wanting to try something new.

Chillybean said:Thank you. I tend to be very cautious about the wild birds when wanting to try something new. :)

That's an admirable trait.