My foster dog, lupa, a 5lb chihuahua just started to attack my dogs, a maltese and pom, but only if they come near her when she is laying down, when they are all up and running around lupa is fine. she attacked one dog on the couch and I removed her, then she did it on the bed twice, and I removed her imediately, but other than that I dont know what to do, i would like to help make her adoptable. she is extremely submissive to me. and right after I pull her away from my dog she even licks my face. idk, what to do.