Boston073, can you explain the history of red and grey squirrels in the US?
I thought this grey v red business was a strictly British issue: the red squirrel is native to the British Isles and to Europe while the grey squirrel is an American species which in the UK one day escaped from a private collection and ever since multiplied here.
As said here in other posts the grey squirrel is more adaptable and less fussy with his food than the native red squirrel so its progression was always to the detriment of and loss of territory for the red squirrel.
My question is: your post mentions a red squirrel in America and a problem there also between reds and greys;
Is your red squirrel the same species and the British/European species? If it is, is it native to the US or has it been imported by European settlers?
If both species are native to the North American continent and co-exist, they probably have their own long-established territories. If your red squirel is an "import", then it is remarkable that he could conquer any territory at all over his grey cousin.