Advice wanted with reactive rescue
Hey Reddit, I'm new to everything with this so please be kind and I apologize for the length of this explanation. I know I tend to ramble
I have a female rescue who is very food insecure despite me having her for about 3 years now. Vets estimated that she was about a 1 year old when I adopted her, so she is 4 now. When I brought her home, she had an incident with my mom's older female rescue where she latched onto the other dog's ear and ended up biting me by accident when I tried to open her jaws to release the other dog. At the time, I was not living with my mom at that time, so we just monitored the two dogs interactions and made sure to have my dog on a lead leash that I could turn her head away to redirect when needed during the remainder of that visit. I also worked on training my dog with basic commands like sit, wait, stay, look, and to go to one of "her spots" (crate, chair, bed). She listens well when alone, but she needs more redirection when there are unfamiliar dogs present.
Unfortunately, my job situation changed where I needed to end up moving back in with my parents. In addition to the older rescue, there is another female dog who is 7 years old. So in total for this house now, there is a 10 year old basset bulldog mix, a 7 year old English Retriever, and a 4 year hound/bully breed mix. I thought that with the frequent visits to my mom's and no repeat biting incidents that my mom's dogs were now no longer unfamiliar. However my dog was now had two additional incidents where she was bitten the 10 year (always her ear but I'm grateful for the loose basset skin means that none of those bites were too serious). In both of these times, my mom has been bitten as well because she tries to separate the two dogs (I have tried to teach them the wheelbarrow method but they struggle because my dog latches and tries to "rat-shake" the other dog which causes my parents to freak out and try to pry open my dog's jaws with their hands leading to them getting bitten). During the most recent bite, my mom needed to get stitches for two punctures on her forearm (all other previous injuries have only been fingers).
I'm at a bit of a loss for what to do to help everyone stay safe. Does anyone have any tips, suggestions, or resources for how to navigate something like this? I really love my dog and I don't want to give up on her