The dog won't starve in a day or two, they can often go longer without getting sick but it's not recommended.
I have had many breeds of dogs but as adults they only eat two meals a day and will often beg for more food even if they have left half their meal in their bows from their dinner. Pretty much scavengers and opportunists, if goods available especially the they will beg, stair stepper the food and plead for it.
M brothers dog Casey managed to eat three cans dog food after her two cups kibble, she proceeded to sneak into the cooler by the grill and ate 12 pre cooked bratworst before she found the two T-bone steaks at 22 ounces each. She trotted inside and polished off the other dogs food the went into the ivingroom to see what people were doing. She begged and got rewarded with a slice of cheese pizza and a hotdog before she decided to take a nap. Being only 65 pounds that dog could put away food.
My sisters Labrador Bear killed off a 5 pound bag of puppy chow followed up by a bottle of chewable dog vitamins (liver flavored) then he managed to scarf down 3 breaded cooked chicken breasts that had been left to cool on the stove and a slab of cooked bacon. Not bad for a 5 month old 40 pound pup. By the time he got to the vet hi had digested the food he ate and his tummy was empty. Vet kept him over night to make sure he didn't block or rupture.
Dogs in general don't know whento stop eating, instinct says to eat now, as much as possible to hold. Some dogs will stuff themselves, they get overly full and will go somewhere, dig a hole or find a hiding spot, they purge then return to the good source and eat more.
If you worried about the dog starving tonight, you can cook up either rice, potatoes, noodles or some starch source, you can add skinless boneless meat, poultry or fish to the carb dish, 1/4 to 1/3 meat to 3/4 carbs. Cooked carrots, Rae carrots if your dog Ike's them, many cooked vegetables work as fillers, my dogs I've raw and cooked peas, green beans, carrots, corn (never corn cob they don't digest and can harm dogs). Rem number don't add salt or spices to the food, things Ike pizza and ham are high in salts, too much much Walt is harmful to dogs
Go on google, put in "foods that are harmful to dogs" and it will give you a list of what's toxic for them to eat
Be aware switching types of foods and different brands of fog foods will upset the dogs digestive tract. Besides diahhrhea, cramping and vomiting and lithergy can happen from sudden food changes the dogs not use to. Mixing the meat and or veggies with meat in a white rice or pasta is easier to digest rather than pure meat. Don't overfeed the proteins, st most 2/3 filler - rice pasta etc to 1/3 meat. When mixing meat eith veggies 2/3 meat to 1/3 veggies then mix with the other.
try and avoid milk as it's not very digestible neither are greens - a little is okay Ike 1/4 cup for a 50 pound dog, more than that causes problems. Canned soup, canned vegetables are high in salt but dogs can eat them.
Peanut butter on bread, low or no salt crackers, meba toast, non sugar cereal like Cheerios also can be given but it's better to leave the dog a litte hungry then to fill it for the sake of eating.