We have an 8 year old female JRT and her 5 year old son. They have always chased cats, etc but have recently gotten vicious about it and killed one of our cats a couple of weeks ago. They have turned on both of the other dogs now, a sweet cocker who is old and weak, and a border collie who usually plays with them. They would have killed the border collie tonight if there hadn't been 3 of us there to pull them off. I had one in my arms and he reached out, grabbed the collie's tail and wouldn't let go! They will chase the horses, but only once have they actually attacked one - they got a weanling filly in a corner a couple of years ago and she fell, fortunately again there was someone there to get them away. The younger dog does mind pretty well by himself, but they can't be trusted together. I hate having to put her down, she's very affectionate with people and has never been aggressive to anyone. She's a spayed female, very pretty and would make a good pet where she was the only one. Just hate this - I've been keeping her locked up most of the time, just letting her out at night when the cats and the cocker are locked up, but it's a matter of time before she slips out. I just won't let her kill the rest of my animals. Very frustrating.
Jan
Jan