Continuity mistake: When Bambi falls in love with Faline (both of them are grown up), her eyes are blue. In the next few scenes, her eyes are brown, then they turn back into blue once Bambi and Faline's twins are born.
Continuity mistake: When all of the animals are leaving after meeting Bambi for the first time, Thumper's mom is the same grey color as he is. Later in the film, she is a completely different color. She is the same tan/beige color as his sisters.