Aggressive Lab

Question
My chocolate lab is very aggressive towards my Siberian husky, they are both females.  They grew up together but for some reason my lab attacks my husky every time she sees her now.  If we try a muzzle to keep her from attacking her, can she still eat and drink and pant?  We would have to have the muzzle on her all the time.  Or is there some other way to keep her from attacking the husky?  Also, the husky won't go outside to go to the bathroom.  I think it might just be because she is dainty and won't go to the bathroom if the backyard is dirty.  But we're all very busy and can't clean it everyday.  Is there any way we could prevent her from going to the bathroom in the house and make her go outside?  We have it so she can walk outside anytime they want.  Thanks.

Answer
Lisa..putting a muzzle on your dog will not help in the long run. It may turn her mean. She will not like it and will feel singled out. You need to hire a dog behaviorist for this and they could probably help you with the housebreaking too. The dog will not go outside as long as you wont make her do it. If you leave her in a crate til she goes outside, you will be able to praise her when she goes in the right place..there is a lot more to houebreaking, but let me know if you dont get a behaviorist..
good luck
nancy