Check the listing for details. Native Remedies Respo-K Spray. Color: See Description, Condition: New, Made in US. Listed at 48.29 USD. Respo-K is a powerful homeopathic formulation for addressing discomfort associated with your pet's respiratory problems. Using a unique, proprietary blend of five highly diluted and scientifically selected natural substances, Respo-K provides an effective and safe choice for easier breathing, nasal decongestion, and lung functioning. Formulated by our team of experts in natural medicine, Respo-K helps to temporarily relieve symptoms of respiratory infection and colds, acting as a decongestant, in cats and dogs. A respiratory infection is an infection of the nose, throat, and upper airways. Respiratory infections affect pets similarly to humans suffering from symptoms of a cold, flu, or chest and sinus problems. Although respiratory infections tend to be more common in cats, dogs are suscep.