Hi everyone, so I am new here but I am very stumped. I have an almost 7 month old beagle/husky mix and she is very active but we take her on a walk/run for at minimum 30 mins a day. By night time she is still active but plays and calms down. Last night at around 3-3:30 am I woke up panicking because she attacked my 1 1/2 year old Australian shepherd for no reason! They were sleeping in separate halves of the room completely knocked out and she just ran to him and started a very big fight. I yelled immediately as it woke me up and they stopped, she went back to bed. There were no noises, no triggers that I’m aware of. She sleeps in a thundershirt since she had anxiety as a pup. Tonight also around 3:30 am she was in a full sleep as was he and they were sleeping separate, she attacked him again! This time it was worse and he drew blood from her. He is a lazy dog, when she engages play with him he doesn’t normally bite so this was a total shock. She sleeps in her crate sometimes since it’s cooler but we leave it I open in case she wants to be out. I really need help because I’m worried it will be worse the next time around! She is also not in any meds, spayed, and she does not have any vision hearing or cognitive issues.