Answer:
intolerance of exercise.
Step-by-step explanation:
Springer spaniels are affected by PFK deficiency i.e canine phosphofructokinase, impacting about 10 percent of the breed. PFK is basically an enzyme known asglycolytic that phosphorylates fructose-1-phosphate and catalyzes glycolysis step.
Considering its crucial role in glycolysis, a consequence of genetic disorder that results in the dog's PFK deficiency is intolerance of exercise.