In addition to fencing supplies, the ACA Brooklyn co-op has a wide selection of animal feed and they carry bales of shavings in paper wrap. They're always dry and fresh. Plus they now get the bedding all winter so you don't have to stockpile a huge amount. The manager there is the co-op feedmaster, so you can count on excellent quality, he's exceptionally particular. And the chicken starter comes with an expiry date (it's fragile) so you always know to use it up. They get day-old layer chicks in May and June. Mine were healthy and free of defects and all the right sex. They also carry poultry waterers, stock dishes and buckets and vitamins and wormers. Oh and they have syringes and droppers.
Some of your other hardware can be found at Brooklyn Home Hardware and there is a tack shop in Windsor that has various other supplies like wound powder.