Similar story here. My folks had a Siamese mix in Colorado that was effectively a mini cougar, capable of fending for itself for days at a time in the winter. One winter night their neighbors stepped outside on their second story deck to check on their chihuahua only to see the cat beat feet, leaving a half eaten dog behind. Kind of gross but it illustrates that barking mice aren’t well equipped to survive without constant owner attention/protection.Friends got a Chihau. pup, another mutual friend, a tall and overly large, loving caring person sat on it and killed it, to the distress of everyone involved.
They got an insurance payout, these things aren't cheap from a breeder. A year later they had another Chihau. pup. They went out for the evening and one or more of their 3 cats cat ate it. Breeder refused to have anything more to do with them.
In a fit of overcompensation they got a Weimariner pup for her and an Irish Terrier pup for him, both survived their alloted span.
Not sure if there's a moral to this story.