Sometimes this is simple neglect - people forget to feed their dogs, or don't put out enough food. In other cases, it is because the owner can't afford to feed the dog but can't bear to turn the dog in to a shelter or pound because the dog may be euthanized. In rare cases, it is outright abuse - a person starving a dog because he/she can and wants to.
yes
yes
-1000000000000000000
A famine is what you are thinking of.
Belarus in Europe
They starve to death
many people died of starvation
They need to eat or they'll starve.
They would starve to death.
it means that the people who are starving should be thought about.
Since the food ran out, all the survivors were left to starve.
famine becomes drought because after the drought people start to get hungry and starve themselves and sometimes they starve to death.