Final answer:
Subcutaneous injections in sheep and goats are given under the skin, typically in the neck or behind the shoulder. For systemic infections, oral administration of antimicrobials is appropriate and convenient for home use.
Step-by-step explanation:
Subcutaneous Injections in Sheep and Goats
Subcutaneous injections in sheep and goats are administered under the skin, which is option C. This method is selected for ease of administration and to lessen the risk of damaging muscle tissue or vital organs. In these animals, common sites for subcutaneous injections include the loose skin of the neck or behind the shoulder. Subcutaneous injections are less invasive than intramuscular injections and less risky than intravenous injections, which require more skill and equipment to perform safely.
Administration of Antimicrobials
In the context of treating systemic infections, the appropriate and convenient route of administration for home use would be oral, as indicated by option A. This method is often preferred for its ease of administration and patient compliance. Other routes, such as parenteral (which includes subcutaneous, intramuscular, and intravenous routes), can be more complicated and typically require specific skills or professional intervention. Topical administration is not suitable for systemic infections as it only treats local or surface issues.