I have been thinking lately about doing the same thing. I notice on my pet food site that people are emailing asking for recipes with particular ingredients. Also with this recent pet food scandal, people are asking questions.

I was thinking a forum would help those who have questions, allow others to enter pictures of their pets and also let users enter their own recipes.

A forum would certainly save me the work of answering emails everyday and would actually benefit my users making my site more attractive.