Do you know why my hair all of sudden is got this dog smell to it after washing?

Perhaps you used old shampoo or conditioner? Try getting a new bottle of shampoo and washing your hair again. Have someone else smell your hair-if they don’t smell it, you may have a sinus infection or some inflammation in your nose that is making you smell the odor. If that is the case, call your doctor-you may need antibiotics. Good luck to you!