What are you considering a neurological issue? Ive had Pups get dehydrated from not being able to drink from a Ball thats to heavy in a water bottle and get Dizzy and Drunk acting.. What are the symptoms your noticing?
I had problems trying to breed feeder pet store Rats period.. Failure to thrive etc for 90% of offspring.. Try looking on Craigslist for Domestic Norway's that are from pets litters not isolated unhealthy/unsocialized feeder Rats.
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