Final answer:
Heavy and floppy ears in dogs reduce air circulation, creating a moist environment that promotes bacterial and yeast growth, which can lead to ear infections.
Step-by-step explanation:
The likelihood of ear infections in dogs can be influenced by the physical characteristics of their ears. The heavier or floppier the ears, the less air circulation there is within the ear canal, which can create a moist and warm environment that is conducive to the growth of bacteria and yeast.
This environment makes it easier for infections to develop in the ear canal.
Additionally, dogs with heavy ears may have more difficulty shaking water or debris from their ears, further increasing the risk of infections.