Food contamination

1.Almost all the restaurants in my area don’t sell halal slaughtered meat(chicken/mutton)so if I eat veg in these restaurants do I always need to ask them about the utensils they use for preparing the veg & non-veg food or just let it be as it might trigger my OCD? 2. Is the issue of contamination of food in Islam real as there is nothing specifically written about it in the hadhees?