It sounds like the same Mary Straus to me. She is not a vet, but I do think she does share some valuable information on the dogaware site. She does not necessarily recommend digestive enzymes unless the dog has a digestive disorder of some kind. She states they generally can produce enough on their own.
This is taken from http://www.dogaware.com:
Digestive Enzymes
Digestive enzyme supplements provide a variety of benefits
Article by Mary Straus, published in the Whole Dog Journal, May 2012
All dogs need digestive enzymes in order to break down their food, making the nutrients available for absorption. In most cases, the pancreas produces ample enzymes and no supplementation is required. Older dogs and dogs with digestive disorders may benefit from enzyme supplementation. Dogs with exocrine pancreatic insufficiency (EPI), where the pancreas is no longer able to produce enzymes, require prescription-strength enzymes in order to survive. Digestive enzymes might also help dogs with food allergies and intolerances.
She continues with more information about her opinion of digestive enzymes if anyone is interested in reading more.
I don’t think she has any formal training, but a lot of experience. Here is more about her:
http://dogaware.com/about.html
