Kitten with head trauma

My 11 week old kitten was diagnosed today with head trauma, I left home for 15 minutes and came home to find him unresponsive and bleeding from what I assumed was caused by my dog, his visiable wounds were minimal (just one puncture wound under.his mouth) he was basically lifeless and barely breathing, we got to the vet by 840am the vet treated with fluids steroids and pain meds, also gave oxygen upon arrival, his body temp upon arrival was low and glucose level very high 380, his eyes are non responsive to light and pupils are note equal, he began regulating his temperature and glucose went down to 270 at the time they sent us home (4pm) and he hasn't changed, he will stretch every so often, try to raise his head, and make noises kinda like a cough sound but it's not a cough, it's a sound hes making, and he has peed a few times on himself since he can't move, he can't blink his eyes so I've been closing the one every so often to prevent dryness, the other one is closed from him laying on the side of his face, I do have him propped up and elevated head, he is not drinking or picking or swallowing and syringe water, my question is, is it possible for him to recover from this? Or does this mean his brain injury is too severe and he will never recover to the point of having motor skills again?

I'm so sorry to hear that your kitten - and by extension, yourself - are having such a lousy time.   Animals and people can recover to varying extents from head trauma, depending on the extent of the trauma and the regions affected.  I beleive that keeping the cerebral and blood pressure, blood glucose and temperature stable can be crucial.  MRI scans / CT and the like are not always available / affordable / helpful.  I do not understand the case well enough to give reccommendations; the ideal situation may be all-round hospitalisation at first.  Your vet however should know more than me about the specifics.  If it's merited, they may opt to seek further help from a specialist emergency critical care team, because most GPs do not encounter this situation frequently.  In my experience, the outcome can be influenced significantly in the first few hours and improvements can continue for a while; however I am in a position to understand less about the prognosis in this particular case than your vet.  Wishing you all the very best at this difficult time.