Number of adult dogs a kennel has = 8 dogs.
Number of puppies = 14 puppies.
We need to find the ratio of adult dogs to puppies = Number of adult dogs: Number of puppies.
= 8:14.
Now, we need to write 8:14 in fraction form

Greatest common factor of 8 and 14 is 2.

.
Therefore, ratio of adult dogs to puppies is 4:7.