Half and half is simply half whole milk and half cream. In the UK, they call it half cream. According The Kitchn, half and half typically has a 10 to 12 percent fat content, which, it stands to reason, means it's less fatty than cream and fattier than milk.
Dogs can eat peas safely. Peas are a good source of potassium, zinc, iron and several vitamins. Depending on the size of the dog, 1 or 2 tablespoons of peas is recommended. The dietary fiber in peas also helps overweight dogs feel full thereby reducing the dog's intake.
While dogs do not require the starch found in grains or potatoes or any other food, there are some instances where you still might derive benefit from them being there. For instance, grains (and starch-containing tubers) contain certain fibers that are beneficial for the growth of probiotic bacteria in the gut.