ive had similar experiences throughout the night.
in what state of mind are you when you see these spirits? usually im in that half sleeping half waking state during sleep paralysis.
thats crazy that your dog saw it too. do you wake up because of these spirits?
i think you should try to communicate w/ them.
i asked one if she had a soul.it was the first thing that came to mind. i was half asleep so barely mumbled it. she was sitting to my left on my bed or on the other side of the wall where i had a dream before i woke up that that was where her presence was. the second i asked her that i was thrown back into sleep paralysis as if some force came upon me then in my left ear i heard her speak words. i cant remember what she said but it was definately a message.

its interesting
you should read The Book on Mediums - Guide for Mediums and Invocators, i am its interesting and answering a lot of questions i had

do you have a punk roommate? oh, its probably a dream.

hmm strangely i have been attacked 3 times so far; the first time i could actually see the rotten aura directly attacking my 4th center; when i perceive spirits i rather see their auras and not a body like thing.
The first time i was lying in my bed before sleep and i started to hear the whispers of a feminine like voice as if she was lying with me there. I couldn't really understand what she was saying me so i went to sleep. then i was having a wonderful lucid dream when suddenly i got inside a house for a reason i didn't understand (in my dream) i climbed up stairs and found my bed, i actually knew that was my room because in my dream my aunt told me that should be my room. Then suddenly i saw a child which stand there, he told me that was his room and i felt like he was threatening me (still in my dream) still i was lucid dreaming and consciously tried to manipulate my dream i told him that my aunt had assigned this room to myself so he should look for any other room since we where in a mansion like house he could pick any other one he liked. What happened next was the child jumped to my bed and tried to get it all for himself; i couldn't understand what was happening since it was my dream and i shall be able to do whatever i wanted because i was lucid dreaming! So i felt there was something else, and then i woke up i was lying in my bed and felt like i was not alone in my room, then from the window the rotten aura appeared and attacked me, i felt like it was trying to posses my body by attacking my soul seat (the area between the pecs). I understood my dream was some kind of warning of this. i got brave and thought about how my soul was pure enough to combat any dirty spirits and then it attacked me in the throat, for a moment i couldn't breath i saw the aura forcing itself in. then i decided i wouldn't go without a fight i thought to myself if i have to die defending my body i will do so, so instead of attacking i tried the blessings and suddenly the rotten aura got somehow rejected.
It was floating in the air and moving around me, i was following it with my eyes telling it; you shall not come here anymore go away this is my body and it's mine by the grace of god, so you won't be able to take it because it's my gift, and after a while it disappeared. So i stand up and went to my mirror to check the damage this aura has made to mine. everything was fine, i just had a little bit of its rotten color in me so i started to cleanse myself until the rotten color dispelled.
I still don't know why or how it happened but sometimes i get the feeling the voice i heard before going to sleep was trying to help me r giving me her blessing to counter this.