1. Use a fly mask. A fly mask will help deter horses from rubbing and scratching, which can cause twigs to get caught in the mane.
2. Mane gel. Mane gel can be used to discourage horses from chewing their manes.
3. Braids. Braiding the mane can help keep it untangled and free from twigs.
4. Regular brushing. Brushing your horses mane regularly will help to remove any twigs or debris that may have accumulated.