So over the last few days I have had three rats that appear to have all of a suddenly came up with serious problems.

Best way possible to describe it is they appear to have had a stroke, unable to righten themselves, tilted head all the time, one was to the point where it is unable to eat or drink and was euthanized. If you pick them up by the tail they will just spin and spin and spin.

This goes along with about half a dozen other rats, some breeders some feeders that have just up and died within the last week,

Any thoughts or ideas would be greatly appreciated.