This thread has got me confused. It seems we started talking about 20 ducks, then there were comments leading up to as many as 150. It sounds like the 20 Blue asked about were likely migratory but that is an assumpion on my part. So my confusion is will the 20 ducks hurt his pond or not; given that if they are wood ducks they likely won't stay much beyond the hatch.
I believe the 50 to 150 might be an issue, but how about 20 which are likely not to stay very long.
