When money is borrowed, interest is typically calculated as a percentage of the principal, the amount owed to the lender. The percentage of the principal that is paid over a certain period of time (typically a year) is called the interest rate. Interest rates are market prices which are determined by supply and demand.
Swollen nipples in dogs is a common symptom seen in mastitis. Mastitis occurs when there is an infection of the mammary glands. Mastitis is common in female dogs who are in the process of nursing. In mastitis, the dog's mammary glands become swollen and painful. The milk is toxic in affected nipples.
Stud tail in dogs, medically referred to as tail gland hyperplasia or tail gland infection is not a very common condition. Not all dogs are prone to this, but some dogs may sometimes develop hair loss and swelling of the supracaudal gland. While some dogs may need a course of antibiotics in severe cases, sometimes a mild case of dog stud tail can be treated at home using over-the-counter products.