My thoughts on this are, I don't leave Aeron and Lilly together for extended periods, just because of what ifs. I would hate to do it and then come home to Lilly dead.
Aeron has NEVER displayed aggression, but she could physically do HUGE damage to Lilly, it is that if factor I am not comfortable with.
Aeron has NEVER displayed aggression, but she could physically do HUGE damage to Lilly, it is that if factor I am not comfortable with.