What kinds of experiences might causes someone to change his or her ideas or feelings about animals?

A person can change their opinions/feelings on animals for multiple reasons. For example, they can make friends with an animal or start a relationship that involves no communication (cause animals can't talk) but lots of love. Also, if the animal starts being friendly to the person, there's a high chance that the person may not take their love for granted.

A lot of things

Explanation:

One thing is their experience with a certain animal, for example, a person might love dogs, then one day, a wild dog bites that person and from that point on, they are afraid of dogs and don't want to be close to them.

Other reason can be that they saw a documentary on a certain animal and that changes their perception of said animal, for example, many people think that sharks are wild and vicious animal, but one day they watch a documentary about sharks and realize that, like dogs, sharks have different personalities and some even approach divers because they like to be petted.

im not entirely sure what you're asking.