I have a duck that has some kind of balance issue, possibly seizures. When she was a baby, she would fall over backwards 50+ times a day, and almost always needed help to flip back over. Now that she's a few months old, her episodes only happen maybe once every week or two, but she's also outside where we don't notice as quickly and the other ducks just leave her. I'd like to mark her in some way so that it's easy to tell if she is with the flock. We already leg band, and I'm looking for a more visible option anyway, especially for while we are on vacation and my neighbor is watching the flock. I was thinking possibly a bright colored zip tie high up on her wing like the zoos do with penguins? Any thoughts on that option or suggestions for other options?