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.
Perhaps one of the most common causes of dog back problems is intervertebral disk disease (IVDD), or herniated disk. The dog's spine (and ours as well!) is made up of small bones called vertebrae. In the case of dogs, the vertebrae extend from the base of the skull to the end of the tail.