You can use Downy on hard haired cattle that have kinky curly hair like Kadabara or Who Da Man. We use a product called Cholesteral that you purchase at beauty supply place. It is cream that you can put in a spray bottle with hot water. Spray on and leave in over night. It relaxes curly hair. It is an ethnic hair product. It is goes farther than fabric softner and is better for the hair and skin.
PS
Make sure you wash it out with soap and do not over use it or the hair will be limp. Only use it maybe two or three times weekly. Just watch the hair you will notice a difference.