About 6,000 years ago, God created the dinosaurs on day six of creation. This is the same day He created man. At this time all things were vegetarian, including the dinosaurs. Man eventually disobeyed God and sinned against Him. Humanity got so bad that God had to destroy the world.
So 4400 years ago, God sent a global flood in which all living things that breathed air through their noses died, except for the kinds that Noah took on the ark as God told him. This would explain the fossil graveyards we find all over the earth. So all the other animals, including the rest of the dinosaurs, and humans died. Only Noah and his family and the animals on the ark were saved. it is possible to get the dinosaurs on the ark. Noah would have taken baby ones. Also there are only about 50 different kinds of dinosaurs.
After the flood, dinosaurs would have lived, but faced many problems. Man most likly killed them off for protection and to prove who the toughest ones were. The flood would have destroyed a lot of food so the dinosaurs would not have a whole lot to eat.
Since man and dinosaurs have always lived together, this is why we have dragon accounts all over the world. The term dionsaur was first made up in 1841. So until that time they were called dragons.
There is much evidence of a global flood in history. For example, if there was a global flood, we would expect to find billions of dead things buried in rock layers, laid down by water all over the earth. guess what we find? Billions of dead things buried in rock layers, laid down by water all over the earth. The only thing we can tell by fossils is that the thing died. We can not tell what it ate or even if it had offspring. Just because the T-rex had sharp teeth does not mean that it ate meat. It means that he had sharp teeth. Fruit bats have sharp teeth and eat fruit. Pandas have sharp teeth and eat bamboo.
Dinosaurs could not have evolved into birds. Birds have feathers. Dinosaurs have scales. It is impossible to go from scales to feathers. Dinosaurs are cold-blooded. Birds are warm-blooded. Again, impossible to go from cold-blooded to warm-blooded.