I have one desensitizing kit to take the dislike of running away, but since these are twins I hesitate to use it on one of them without having one for the other twin. I had a pair of twins who disliked eating and I desensitized one and not the other, the twin who didn't get desensitized to take away the eating dislike became depressed, apparently from being different from her twin. I could find no other reason, not sickness, etc. If a second desensitizing kit shows up I will be able to do both of them.
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WARNING: I cannot be held responsible for the above as apparently my cat has learned how to type.