Hello, I am new to this forum. I have a question about dominance between dogs in our family.
Our family has three dogs. Two are dachshunds, a male about seven years old, a female about six years old. Our other dog is a female about three years old, a your-guess-is-as-good-as-mine mixed breed (the face looks a little like a border collie, body is tall, thin, and muscular like a sight hound, but these are just guesses). The younger dog was found (abandoned) along a road when she was very small, probably one month old(?). All have been spayed/neutered.
The problem is between the two female dogs.
The female dachshund, though our smallest dog at 13 lbs, has always been the "alpha" dog. Our male dachshund has virtually no interest in dominance issues. The other (three year old)female, 35 lbs, is typically nervous, high energy, somewhat timid and fearful, and in the past has generally has taken the role of low dog in the pack (which we have attributed to the abandonment).
The problem is that sometimes the three year old will quite suddenly and loudly attack the female dachshund. This often occurs during feeding, when receiving rawhide chips, etc., but sometimes outside for no apparent reason. No injuries have resulted yet, but we are concerned that this might change.
I am assuming the three year old is trying to assert dominance. How can we control this situation so that it does not result in injury to either dog?
Any suggestions would be appreciated. Thanks!

