If you are feeding your dog Grain Free food - STOP FEEDING IT. There is an issue with dog foods now that you must have heard about in the newspapers, on facebook, on TV etc. etc. If your dog is on Grain Free
food and is quietier than normal, no energy, coughing, dont stop the food but get him to your vet and have blood taken for a Taurine Level test. Then change his food. Some vets are not up to date on this issue so you might have to be an advocate for your own
dog. The issue seems to be with more expensive, high end, seemingly great quality foods. They are also using more peas, pea proteins, legumes, potatoes in their foods. One thought is the legumes are causing an issue with the dogs' own Taurine
There are many sites for you to go study this issue. There is a Facebook page you can join, there are many sites on google. Some sites will tell you the foods that are being recommended now
until they can figure out what exactly is happening. The GRCA website has information about DCM. Please take this seriously as many dogs have died.
Some of the foods that are being recommended are foods I
never use. Purina Pro Plan, Royal Canin Golden Retriever, Eukanuba (I used to use that all the time), Science Diet. Their ingredient lists are still not what I want to see. Obviously I dont have the knowledge that is needed at this point! Heart breaking to have your dog drop dead from an enlarged heart caused by you feeding the best food you thought possible!
I hope to add more information soon.