Laika the dog was the first animal in space, aboard Sputnik 2. According to this answer, her mission was intended for 10 days, but Laika survived only 2 days due to the spacecraft overheating. Wikipedia claims that she was to be euthanized by poison in her last food ration, had her mission lasted the full duration.
Sputnik 2 also passed through the Van Allen radiation belts, even though they were not discovered until later.
Assuming that the thermal and environmental control systems of Sputnik 2 worked properly so she could have survived for 10 days, what would be the effect of the exposure in Sputnik 2 to 10 days of radiation in the Van Allen belts? Would physiological or neurological changes be noticeable? Would Laika have survived this radiation?