..the more you find out about how Horner gets his themes..
The first track, the chord-shifts with the piano etc. is actually a part of track 5 on Sleeping with the Enemy, by Goldsmith.
And did you know that "The land before time" actually has everything Prokoview did in Peter and the Wolf before..? ..and that The land before time also copies a part of the last few minutes of Tchaikovsky's Romeo&Juliet overture.