It can be a bit tricky to diagnose an asthma dog sufferer or dog asthma attack. The range of diseases that need to be ruled out include Kennel cough, infection, collapsing trachea, laryneal paralysis, heart disease, heartworms, lungworms, fungal diseases and lung tumors. Your vet will first do a complete physical exam followed by a chest x-ray and brochoscopy (taking a tissue sample to examine under microscope) to rule out any other respiratory problems. If your vet doesn't find any other cause for your dog's symptoms, he or she will probably prescribe asthma medications and wait to see if those help. If they do, then if can be concluded that the diagnosis of asthma is correct.
I’m a veterinarian in FL so allergies in dogs and treatment for them comprise the larger part of every one of my working days. I’m responding to the last iaragraph of the initial post…..fish oil as a source of omega-3 fatty acids can help reduce itch in your dog, this is true. Olive oil is not an option for this purpose and will only fatten your dog. Depending on the breed of dog (some are more predisposed than others) you can actually cause pancreatitis by adding olive pile to the food and I want to help you avoid this.
Hives, also known as urticaria, are a type of skin rash that are the result of an allergic reaction to a substance, called an allergen, in the environment. Although the cause of hives is not always known, they are often a response to the body releasing histamines, which it does when you have an allergic reaction to food, medicine, or other allergens. Histamine is also sometimes the body's response to infections, stress, sunlight, and changes in temperature. Hives typically manifest as small, swollen, itchy, red areas on the skin that may occur singularly or in clusters. Left untreated, hives usually fade within a few hours, but new ones may appear in their place.  If you want to try to cure your hives at home, there are many different natural remedies to treat your hives.