All my advice here is free. All of my advice in person is free, too (at least 'til I can call myself a canine professional). Sometimes I just can't help giving advice, really, but there are times I keep my mouth shut (if you can believe it), for various reasons. Sometimes it's safer for Elka and I to just move on, sometimes I recognize the person from about town and know that they won't listen to any advice I have to give, and sometimes I'm in the car driving by, and think it's super sketchy to pull over and leap from a vehicle to hand out free dog-handling advice (I'd need a cape and a mask for that). So. I'm unbottling all of that advice that I kept to myself, and sharing it here with you.
Scenario 1: I was at the Feed and Seed, looking for treats or toys, I don't remember which. Another customer (who I recognized from my job, and had dealt with) went to the clerk and, swear to God, said "I need a collar to choke my dog so that I can control him." The clerk, bless her, lied to the customer and said that a Martingale collar was "basically" that (it's not), but I think that particular customer probably went home with a choke chain.
Free advice: If you absolutely cannot physically control your dog, try a head halter. Much as I don't like them, as they can cause dogs pain, irritate their eyes, and exacerbate existing neck and vertebral problems, I cannot countenance going to a store and telling a complete stranger that you want to choke the sh*% out of your dog. If your dog pulls like a truck on a leash, try finding out what interests your dog, and luring a heel with treats, or a tug toy. Also, see my post The Clicker Crossover: Loose Leash.
Scenario 2: Person was walking an obese pug. Pug was wearing a harness, rear clip. Person had a treat bag hanging from their belt. Pug stopped to sniff something, person yanked on that leash as hard as they could, without saying anything first to the pug.
Free advice: Your obese dog is clearly food motivated. If your dog is stopping to sniff things and never looking at you, you clearly have a communication problem. Does your dog know that proper behavior = treats? Did the treats you have in that bag suck (see my post on training treats)? Harnesses are not for corrections, and corrections do a good job at fueling your frustration and making you want to yank more.
Scenario 3: Customer ahead of me at Tractor Supply, with a GIANT bag of Kibbles 'n' Bits. Customer complaining about the cost of the food ($20 for the 50 pound bag, I think? I didn't pay much attention to it on the shelf) and how often he has to buy it.
Free advice: If you buy your dog a higher quality food, the dog will need to eat less of it. High quality kibbles have less filler. High quality kibbles have real food in them, as opposed to "wheat middlings" and "animal digest". A higher quality kibble can make for a higher quality, um, dog waste as well. Smaller, etc. Again, because of less filler. Less filler, less waste (What's for Dinner?). Or, if you're set up for it, space and freezer wise, you could feed raw. I hear that can be very cheap, if you hit the right sales. You just need to be sure to get the right nutrition levels, which are something I do not have the knowledge to advise on.