are you using a stencil or pattern for the feathers or trying to "wing it" Your example looks like you need more control over the motif. I realy don't believe you can successfully just sit down and do the feathers without a plan and pattern to use as a guide. I don't know what practice you have done leading up to this. I suggest you practice just doing loops in about the size of your feather. Work for control of the needle. Go slow. Draw the design and follow it Dont try to make the design freehand until you have enough practice. Looking at your sample it appears you need a lot of practice to do it successfully. I do feather differently than others. Most double stitch the spine. I double stitch every other outside curve. It makes for more even lines for me. Get yourself a stencil, preferable one that is for continuous line feathers and practice.