Dead people in dreams

Multiple times now, I've dreamt about someone that i love who has died. Last night specifically, I dreamt about my two dead rabbits. My sister was in the dream too, and we both acknowledged that they are dead, but for some reason they're acting alive, but zombielike. She said "you know they're dead right? I didn't know if you knew" and i think that was my brains way of reminding me that they're dead and i don't get to keep them. My dreams have done this with dead grandparents too, i see them in my dreams, but i cry and freak out because i know they're dead and this isn't real. My brain has a very complicated relationship with death, i think the death of my grandparents traumatized me. Also, the night before my grandpa died, i dreamt about seeing my other dead grandpas ghost, then his ghost turned into the grandpa that hadn't died yet. The next day, my grandpa died. I think the universe was trying to warn me