This morning Cinnamon (7.5 y/o pitX) and Pepper (3.5 m/o husky/blue heeler) were having their morning "play". In other words, they'd both gotten up and eaten and were crazily playing after a night of nothing lol. Pepper likes to run under the coffee table where Cinnamon can't reach her until Cinnamon pretends she's lost interest, and then Pepper comes flying out and they play some more, repeat.
This morning they were playing behind my chair when I heard Pepper start yelping her head off, I turned around and I couldn't see her, Cinnamon was standing about 8 feet away staring at the coffee table like "WTF is that racket?". I jumped up and ran to the coffee table and I'm assuming she got herself stuck under there, or thought she was stuck, so I grabbed the bottom and lifted it up. She continued yelping and crawling towards me, and by this time Cinnamon was standing a couple feet away watching the whole thing. As soon as Pepper got almost out (still yelping) Cinnamon suddenly lunged for her, growling and snarling. I told her to "get back" a command she understands, but she completely ignored me so I had to grab her collar with one hand and pull her back as best I could while holding the coffee table up. I knew something bad could very likely happen, considering I'm not the biggest and strongest person and I have a 70 lb dog in one hand and a 80 lb coffee table in the other, but luckily nothing did and as soon as Pepper got out she stopped yelping, Cinnamon quit going for her, and they were the best of friends again.
Needless to say Pepper isn't allowed under the coffee table anymore and they have both been closely monitored, but there hasn't been any kind of change from their normal interaction they usually have together. This is the first sign of aggression Cinnamon has showed toward Pepper and I don't understand why she chose to do it while the dog was trapped and crying. Is there any way I can teach her something to get her to immediately stop her behavior and lay down or something, in case it does happen again? She usually minds well, does what you tell her, and I don't have any problems with her, but this is something that really concerns me considering she COULD hurt Pepper if she chose to.
BG info on Cinnamon if it helps: When she was 9 months old we took her to relatives for Christmas where everyone had their dogs, so it was something like 2 red heelers, a good size mutt, a schnauzer, a shar pei, a few chihuahuas not to mention a couple cats. She got along fine with all the dogs, although the schnauzer wouldn't let her get near her, she was an old dog and really cranky. At one point the schnauzer backed up into Cinnamon, which scared the schnauzer, so she turned around growling and snapping at Cinnamon, which then scared Cinnamon, so Cinnamon turned around bit the schnauzer in the stomach and it took 3 of us to get her to let go. The schnauzer lived thankfully, but she had to have stitches and tubes to drain fluid and stuff. This was when she wasn't even a year old and full grown, so I'd REALLY like to prevent something like that happening now.
This post got much longer than I thought it would but basically, please if anyone knows a way to get through her complete and utter focus and make her mind when she's riled up I'd feel a lot better.