From a handbook of years gone by:
"In purchasing a squirrel, be careful to select a young one: when taken old, they are sulky and morose in disposition, and almost incapable of being tamed, besides being far less beautiful in their appearance. Old squirrels may easily be distinguished from the young, for they are larger, have stouter limbs, are of darker colour, more inclining to sandy-brown, with less of the reddish tinge in it; their teeth are also larger and stronger, and perfectly yellow, and their tails by no means so full and bushy as those of young animals. A fine young squirrel may be purchased of a bird-fancier for about five shillings. In the country they may be obtained, much cheaper, of the boys who sometimes catch them. They are often brought to Whitechapel hay market by the farmers' boys."
Cassell's Handbooks. Handbook About Our Domestic Pets. New York, London, 1862. 60. Web. Google Book Search. 21 Jul 2009