My mum sort of does say what the OP's friend accused her of saying/implying, and she's still not a jerk. My mum has never liked dogs particularly, but my stepdad and is a huge dog lover, so since I was a kid we've always had dogs. She's nice to the dogs and takes care of them, she'd never be cruel to an animal, but she's not totally invested in them, and our current dog is a PITA, to put it mildly. Her worst offence is using the front door mat as a toilet (she can go out into the yard whenever she wants through a dog flap, so it's not that she's waiting by the door to be let out and just can't hold it any more). People then open the door, step in it, and... it's not pretty. It's not that my mum can't wait for her to meet her doggy maker, but... I don't think she'll shed a tear. And I still don't think she's a jerk. She provides a rescue dog with a good home, she just isn't head over heels in love. So what? The dog gets that from my stepdad anyway, he spoils her rotten.