Since the 1800’s an increase in selectively breeding dogs for human desired traits increased. How can selectively breeding dogs negatively affect the dogs?

It makes the dogs at a higher risk of health issues later on in life.

Explanation:

The dogs are usually only bred for looks. Their health is not taken into consideration.

feral cats are estimated to eat tens of millions of native animals each night in australia

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.