You don't need to actually own a tractor to shop at Tractor Supply. The merchandise appeals to the…read moresmall farm hobbyist, or a homeowner who lives in a rural setting with lots of acreage and needs to tame nature just a bit. (Maybe a tractor might be a good idea after all.)
Tractor Supply is fancier than the other, locally owned feed stores. They have a lot of the stuff a feed store has, including cow ear tags and horse vaccines, but they also have what I think of as the "tourist" section, with miniature farm animal and tractor toys.
They have Carthart work boots & clothing (I got a nice pair of coverall pants here) along with Ararat shoes & boots and other country inspired footwear, pants & shirts for men & women.
I won't buy pet food here--not high enough quality for me. Also, don't let your dog eat anything off the floor. There are occasional spills in the pet food section.
I have bought cat and dog collars and leashes, certain treats (read the label if you don't want stuff from China) and a few dog toys over the years. They used to have some 1" wide 6' long leather leashes, but I haven't seen them there these days, so I ended up purchasing a nylon leash, which is not as abrasive on the hands, but my dog doesn't pull on her leash. Leather is better when you have a puppy or a dog that still pulls on the leash.
One of my best purchases: a pink, rubbery horse brush (out of the horse supply section) with tiny rubber bristles. It fits over your entire hand, like a mitten. I use it on my cats. It's the giant tongue that licks them all over their body. They love it, and it reduces furballs.
They have a very basic selection of veggie and flower seeds in the spring. The bagged onion sets, asparagus roots, rhubarb, etc. are a good value, *IF* you can buy them before the dry heat of the store causes them to sprout, dry out and rot. (Sniff the onion sets before you buy. Don't buy them if they smell like "Ew!")
They have pet adoption days once in a while. (Dogs and cats, access to low-cost spay and neuter, etc.) Oh, and the baby chicks and ducks! You could start your own little egg farm.
The book and magazine section is very nice. The topics include: homesteading, raising animals, horse riding, do-it-yourself, and traditional arts & crafts. Worth having a look now and then for crafty ideas.
They have tractor and lawnmower parts, chainsaws, riding mowers and snow blowers. Most of the parts are made in China, but who makes these in the USA any more?
They have a decent hardware fittings section. Between Tractor Supply and ACO hardware, you can usually find what you need in Saline ... otherwise head to Stadium Hardware in Ann Arbor, which seems to have every doodad known to humanity.
They let us bring our dog in there, and she gets a treat at the checkout register. She loves the place even more than I do.