Dalmatians are doing lovely, thanks for asking

lol
Glad you at least thought about it, some people dont think when heat is involved it brings all the vapors out and some could be very harmful to animals and also us. If it smells strong and it wont go away (even with a few days ventilation before putting the animal in there) then why would anyone want to stick their animal inside that and make them breathe the toxic air?
When I had my custom units built, I had them air out for a week to insure any smell of the products were completely gone. I even researched and talked to quite a few people/companies of what was ok to use as paints, adhesives, etc when dealing with enclosed heated cages. Many people dont think about that kind of thing. Your not just building a cage for a dog house, your building an enclosed (or mostly enclosed) cage that will be heated. All sorts of toxins and vapors come from things (especially when heated) and considering its basically an enclosed cage with an animal inside you need to be careful. Glad your a responsible guy and thought about it