If repeatedly breeding two keeshonds always results in a quarter of their puppies with diabetes what does this suggest how the disease is inherited?

If breeding two Keeshonds consistently results in a quarter of their puppies developing Diabetes, it suggests that the disease may be inherited in a recessive manner. This implies that both parents likely carry a recessive gene for diabetes, and only when a puppy inherits two copies of this gene (one from each parent) does it express the disease. The 25% occurrence in offspring follows the classic Mendelian inheritance pattern for a trait governed by a single pair of recessive alleles.