He broke up because my dog injured his cat, was that fair or not?

My boyfriend broke up and called me the worst owner ever after my dog (female, mastiff mix) injured his cat,. It followed my command on the 2nd time though and I got her away from the cat.

That was the first time I've seen her hurting a cat though. She's friendly to people and never had an issues before. That took me by surprised and I was unprepared for that reaction though. Do you think the break-up was fair or not?

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+1 y
What we saw happening to his cat was out of her character. She's calm, docile and friendly but my ex boyfriend now hates her and isn't speaking to me.
He broke up because my dog injured his cat, was that fair or not?
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