I've used red zip ties along with pink, yellow, blue, purple, orange, and green on chickens and had no problems with the colors. I've never had a problem with red, it stands out pretty well and is easy to see. You might not want to use yellow on yellow legged chickens and the blue or purple can be a bit hard to see on black legged chicken. Use your own method but I use a color on the left leg to show which year they were hatched and different colors or combinations of colors on the right leg to show individuals. A red on the right leg might be one chicken, yellow a second chicken, and both red and yellow a third. Many, many possible combinations. And you can duplicate with different breeds or colors as long as you can tell the breeds apart.
Chicken legs will continue to grow thicker even after they are grown so you do need to regularly monitor how tight the bands are and replace as necessary. I trim off the excess length and have never had a problem with the chickens pecking at the bands, let alone tighten them. But anything is possible.
Chicken legs will continue to grow thicker even after they are grown so you do need to regularly monitor how tight the bands are and replace as necessary. I trim off the excess length and have never had a problem with the chickens pecking at the bands, let alone tighten them. But anything is possible.