Actually I just asked a similar question.My Betta sits on the corries wafer and wont let them eat.As soon as I went to feed my Betta a treat,the corries swam over and ate. My tank there has been no nipping or chasing. As far as the neons, did you have them before the Betta was added, if so, did they all come up? Yes they can be a little scared.IDK how but when its feeding time, try to keep your Betta busy at one end. In a 29 gallon I have Serpe Tetras,Black Skirt Tetras,Glofish and 2 mollies. Tetras are nippy. With your ten, try to put a couple of small pinches of food.It depends on the type of food as well. Expereminting with the amounts may cause a Ammonia spike,so keep a test by.Oh usually its what they consume in 3 minutes?
Betta's: "Mint" & "Flare-Boy"
Other:6 misc catfish,Tetras,Glofish,Mollies
*RIP* To all my past little ones