Hi
Hello! How can I help you?
Can you help me with my presentation about dog breeds? 
What color of Labrador Retrievers there are. 
How long do they live? 

As far as I know the breeding has side effects and when most labs get old, their back legs deteriorate. Is that true? 
What other potential health problems do they have?
Sure! Here is some information I know:

Labrador Retrievers come in three colors: black, yellow, and chocolate. Dogs with yellow or black coats live about 10% longer than their chocolate counterparts. The median longevity of chocolate labs was 10.7 years, while the median longevity of yellow and black labs was 12.1 years.

The average lifespan of a Labrador Retriever is 10-12 years. However, some Labs can live up to 14 years.

Labrador Retrievers are prone to several health issues such as hip dysplasia, laryngeal paralysis, arthritis, hypothyroidism, elbow dysplasia, seizures, and more. They are also prone to obesity and bloat. As for the side effects of breeding, it is true that when most Labs get old, their back legs deteriorate.

Let me know if you need any more details, or if you need some more information for the presentation. Good luck!