Why funny you mention that. I got on their web page this morning to fill out a form regarding just that issue. My cats had been eating turkey & salmon for 4 weeks now and LOVED it. I bought a new case of it, though, and one cat will not touch it and it smells really odd (musty is the best word I can think of - not at all a food smell unless it is rotten). When I filled out the form I also told them the date on the can and there was another code.
I received a FORM LETTER in response:

Thank you for taking the time to write Old Mother Hubbard regarding your
dissatisfaction with WellnessŪ Turkey & Salmon canned cat food. At Old Mother
Hubbard we are committed to providing the highest quality pet foods and treats
available. Our expert staff of engineers is continuously improving our products
to ensure that they are tasty and nutritious for your pet.
In order to better assist you with the issue you are experiencing with our
product, we would like to speak with you directly. Kindly call us at (800)
225-0904, ask for me and provide the reference number listed below. Or if you'd
like to provide us your phone number we can call you.
We are aware that Natural Balance has initiated a recall. No products made by
Wellness & Old Mother Hubbard are affected in any way. The ingredient in
question is Rice Protein Concentrate and not Rice. We use Rice protein in only
five items; Simple Venison, Simple Duck, Old Mother Hubbard Puppy treats ,
Wellbar Fish and Wellbar Yogurt. In addition, we have tested both the raw
material and the finished product in these products, and they were found to be
free of melamine.
ALL other Wellness products do not contain rice protein.
See our website for more on your concerns about the recall (see the link below):
http://www.omhpet.com/omh/about_philosophy.html
You can continue to use our products
Thanks again for contacting us.
Mike Shapiro
Specialist
Consumer Affairs I sent them back a response saying basically you got to be kidding! I go to the trouble of filling out your form and you send me a form letter? I did not ask about the recall (and there are more recalls than just NB), and I did not ask about your improvements. I told them I was not happy about receiving a form letter and to respond to my question.