Java ignited a revolution when Sun transitioned it to the Web in 1994, and although Java has been reasonably successful on the client (the user's machine), Java on the server became very popular. When a Java program is launched from a Web page, the program is called a Java applet..
It means that the breed has been over-breed. The female is breed over and over, too often and without proper testing. I have heard of lots of Cocker Spaniels with genetic eye problems from over/improper breeding. Overbred is when a dog has litters back to back, usually every 6 months.
Breeding though is not recommended before the 2nd or 3rd heat cycle regardless of the age when the dogs first come into heat. Bitches bred after the age of five commonly have difficulty in conceiving and in carrying a litter. Bitches bred at an advanced age are noted to have smaller litter size.