Hello! I have a 1 year 2 months pitbull. Her name is Milka. She was 12 weeks when I adopted her. She grew up with my other two pups, Maxine a 15 yo chihuahua and Marķa, 8 yo dachshund mix. She never had any problems with them. About a month ago they were attacked by a loose sharpei while we were on our daily walk. The dachshund got the worst part of it. They were separated during Marķa's recovery, and I did not walk her for a week or so because I was still scared to go out, to be honest. They got together again and things seemed ok. Then she went on heat and I couldn't walk her either. I tried to keep them separated because I noticed she was moody, but once while I was feeding them I got distracted for a minute. They fought over the food. I was fast to remove her and the weenie only got some minor wounds. I had to be absent for a week, and just came back. I still have not dared to let them interact because I am worried the pit will attack again. I notice some tension between them and I can see the weenie dog is scared of the other, she won't go in the backyard anymore and she won't get close to her even if there is a door or bars in between. Today I took the pit alone for a walk and we came across another weenie she has previously met and played with. The puppy was very excited, pulling and scratching. Milka first tried to avoid him, but since the owners did not restrain him, and he went on jumping and scratching, she showed fangs and did a sort of bite in the air. I am new to pitbulls. She had never done something like that before. She was very well behaved and friendly with both dogs and people. I'm concerned that she might be becoming agressive and I'd really appreciate any advice on preventing this from escalating any further. Thank you in advance.