Since manufacturers don't have a habit of making dangerous aspects of their products readily known, we usually have to make specific information requests. While it may be tedious, e-mailing or even mailing a written request/inquiry will often get you credible replies, where phone quests normally only get you scripted advertising spin.....
You might want to use something like this:
I am in the process of researching possible replacements for our gas fired oven unit and my primary concern is the offgassing of any fumes and/or substances, from the replacement unit, which may be toxic to avian pets within the household.
Does your company manufacture any gas oven units that do not offgas fumes and/or substances which might be toxic to avian pets during the normal range of their use (400 degrees Fahrenheit/204.4 degree Celsius), this would also include PTFE coatings and release substances.
Thank you for your prompt reply.