You can try the lysing buffer from BD bioscience #555899 and associated protocol, it works very well for mice RBC lysis. 

Good luck

I have always used BD PharmLyse to lyse RBC  in rat spleen, blood or tumor tissue without any problems.

You can refer to the following link to get valuable informations:-

1. http://www.kumc.edu/Documents/flow/Peripheral%20Blood%20Mononuclear%20Cell%20and%20RBC%20lysis.pdf

Hi

you can try this one  (0.15 M NH4Cl, 10 mM KHCO3, 0.1 mM EDTA) for 5 min on ice and then wash with PBS. it works

Best

Celimene

All of these methods that have been posted are very good and effective; I will offer another one here:

Water shock method: Suspend blood in 9 mL of sterile water and mix for 10-12 seconds.  After incubation, add 1 mL of 10x PBS.  This method works very well, is quick, and can be scaled up for more volume of blood.  Amonium chloride (NH4Cl) buffers work very well, but I would suggest diluting them out after lysis is complete to stop the reaction. 

Hope this helps!!