The Bible teaches (in Genesis 1:29?30) that the original animals (and the first humans) were commanded to be vegetarian. There were no meat eaters in the original creation. Furthermore, there was no death. It was an unblemished world, with Adam and Eve and animals (including dinosaurs) living in perfect harmony, eating only plants.
Sadly, it did not stay this way for very long. Adam rebelled against his Creator, bringing sin into the world (Genesis 3:1?7; Romans 5:12). Because of this rebellion, Adam, and thus all of his descendants (you and me), gave up the right to live with a Holy (sinless) and just God. God therefore judged sin with death.
The Bible plainly teaches from Genesis to Revelation that there was no death of animals or humans before Adam sinned. (Consider just a few of the many passages, such as: Romans 5:12; Genesis 2:17; Genesis 1:29?30; Romans 8:20?22; Acts 3:21; Hebrews 9:22; 1 Corinthians 15; Revelation 21:1?4; Revelation 22:3.) This means there could not have been any animal fossils (and no dinosaur bones) before sin.
After Adam?s sin, animals and people started to die. It was now a different world, one of death and strife. A world that was once beautiful now suffered under the curse placed upon it by the Creator (Genesis 3:14?19). But a promise was given (Genesis 3:15) that God would provide a way for the penalty of sin to be paid so there would be a way for man to come back to God.
it what i found out while reaserching dinosaurs and the bible