The trade off that dogs with this type of hair coat need more grooming and suffer more in hot weather. (2ndchance.info)
So diseases of almost any organ or gland can cause poor hair coat quality. (2ndchance.info)
Increase in appetite, weight loss, increased water intake and urination, periodic vomiting or diarrhea, changes in hair coat or grooming habits. (cheshirecatclinic.com)