hmm i have seen frozen pizzas with soy cheese. today actually. definitely no rennet but casien. there are also cheeseless frozen pizzas! amys organics makes both and i have seen regular cheese frozen pizzas of that brand too and while i havent read the ingredients on those ones since i wasnt buying, id be surprised if they have rennet in them since it seems to be a vegetarian company. im sure there are many others too just not the mainstream companies. i dont know where you shop but any hfs should have them but i was even in a real grocery store today and couldnt believe they had cheeseless pizza. course for the price they asked i wouldve went to papa johns before buying it. anyway my point is, while i was drooling over expensive pizza i wanted, i saw the regular cheese ones and soy ones too. anyway i know if you live near a hfs you will find plenty w/out rennet. good luck.
"I just think there's something in being lost. I never feel lost. I just think, 'Oh. I've taken a diversion'." ~ Karl Pilkington
I don't know where is HFS. I shop at FoodMaxx and Food Source. They have only mainstream pizza like Tombstone, Freschetta, Tony's, Red Baron, et al.
I used to get Amy's pizzas (yes the cheese is veg) from Whole Foods and Al-Safa halal pizzas from Albertsons but one was too expensive (and Whole Foods was like 30 miles away) and the other tasted like ****.
You might need to write or call Tombstone, Freschetta, Tony's, and Red Baron's to find out what they use for the enzymes in the cheese. I'm kinda bad about it, I just assume that if it says enzymes it's veg friendly, so I wouldn't know for sure.
If you're willing to try vegan pizza, Tofutti makes a good one. It might be a little hard to find, though. Their cheese is pretty similiar to one on Ellio's pizza. They make an Ellio's type and also one with bagels. The Ellio's type ones are better in my opinion.
I emailed nestle about their tombstone pizza. They responded by saying that most of their cheeses do not contain animal derived enzymes. Mozzarella, cheddar, brick, colby and monetary Jack contain enzymes exclusively from microbial sources. However, their romano and asiago cheeses contain enzymes derived from lamb. Also, the l-cysteine is made from duck feathers.
I just spoke with Red Baron 4 cheese Pizza and this pizza is 100% vegetarian, the main company has many brands. Another of their brands is Francheta 4 cheese and is 100% vegetarian. What I was told that only the speciality Pizzas has animal products the regular one don't