Subcutaneous injection and intramuscular injection are both acceptable. First of all, monoclonal antibodies should be dissolved naturally, and the temperature should not be too low, otherwise it will be very painful. The absorption of intramuscular injection is slightly faster than subcutaneous injection. But generally speaking, intramuscular injection is necessary for dogs, except for special requirements, most of them are subcutaneous injection, and the effect is the same. Intramuscular injection has a strong pain, and dogs may attack people when they are hurt, so subcutaneous injection is generally used. On both sides of the neck, remember never to be on the lower side, which will hurt blood vessels and trachea. Lift the skin and penetrate the skin for injection. Be sure to protect the dog before the injection to avoid hurting people.