You can only change your neighbor's fence with their permission. A neighbor's fence is their property, and altering it without their consent could constitute trespassing or property damage, which may have legal consequences. If you have concerns or disagreements about your neighbor's fence, communicate with them openly and try to reach a mutually agreeable solution. If you believe the fence violates local zoning laws or property regulations, consult with local authorities or seek legal advice to address the issue through proper channels. 

Regular lawn care keeps snakes away because it eliminates common hiding places. You can deter snakes by trimming grass, shrubs, and trees and removing weeds from your lawn and gardens. Clear away leaves and other debris that could serve as a potential snake habitat. You can also seal entry points around building perimeters and install metal snake fencing.

Glass fences are extremely strong. You can drop 10mm thick tempered glass on concrete and it wouldn't break. Considering that certain types of glass are bulletproof, glass has the capacity to be exceptionally durable and resistant to breaking. Certain types of glass, like laminated glass, are designed to not shatter at all, but rather break into giant pieces.

When deciding to replace or repair your existing fence, consider the 20% rule that fence builders reference. This rule states that if more than 20% of your fence needs repair, you should skip the repair and replace it. Additionally, if your fence is nearing the end of its life, it's often best to replace it.

Repairing the fence is a good option when you have minimal damage or damage from a specific event versus wear and tear. Your fence repair professional can assess the damage and compare the repair price with the cost of a new fence.