The writer speaks about his enemies as if they were dogs. His enemies are coming close to him like wild dogs do to a dying animal. Alternate translation: "my enemies are like dogs that have surrounded me" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This continues the dog metaphor. The writer speaks about his enemies as if they were dogs that are biting and piercing his hands and feet with their teeth. (See: [[rc://en/ta/man/translate/figs-metaphor]])