My character was hungry and I glady found a house which not got looted a while ago so I find backed beans and tuna.

I am sure you wanted to keep it realistic with that "idea" BUT every housekeeping contains a can opener or sometimes too. But your houses are empty most of the time. A Player should be able to find a can opener easier then that. Havent even seen one within 2 days of playing. Pls overthink that or add more solutions to open them. Maybe with a knife, or with an Axe. (Thats possible even if you would loose some % of the food.