Flat is better, dots will pinch his neck and make him uncomfortable. Different behaviors and different places need to use different dog chains, and various types of dog chains have their own advantages and disadvantages.

For example, leather dog chains usually take a long time. If a dog pulls them, it won't burn your hands, but it's more expensive.

Synthetic leather rope is cheap, light and easy to clean, but if the dog rushes over, it will burn his hand.

If your dog likes to bite, metal or chain dog chains may stop it, but they are heavy and troublesome. A retractable leash allows your dog to swim freely, but it will strengthen the dog's pull on the leash.