[Neuroscience] ketamin/xylazine?

[saif]

Dear sir, 
im using ketamine/xylazine for 2vo surgery in male sprogue dawely rat, I lose a lot of my rats post-operatively, the problem how much time dose the rat require to have adequate temperature(isnt it within 4-5 hours postoperatively), and about the fluid supplement is recommended to give all the rats 10 ml normal saline.
dr.saif master researcher.
thank you