'..delighted to see the notice at the end saying that they could guarantee that no harm was done to any of the animals in the film in the course of production.Of course the only animals in the film were dinosaurs of one sort or another...'

Years ago I watched a program on how the first Jurassic Park was made. The dinosaurs were indeed simulations of some kind, but the sounds they made were produced by real animals. They made recordings of various animal calls and combined them to make them more powerful and exotic. I believe one sound combined the rattle of a snake with the call of a large owl.

Thus animals were involved in the making of the film, but only in an auditory way.

I watched this at my mother's house. She had two young kittens that were not very tame. After the demonstration of animal noises, I glanced down and realized that both kittens had leapt into my lap and were making themselves as small as possible. They were afraid of the animals they had heard.