Honey won't make any difference for a strain which is why she is coughing as its not and irritating cough ... Good grub to help her heal and rest for a week and she will be back to normal ... Very rarely a strain can become infected but as I said that's very rare ... Just keep an eye on her and once she is right build up her fitness steadily ... Apart from my dogs having to work all,year round this is another reason I have never let my dogs rest through the summer .......