
You have to go grocery shopping anyway, so it should not be a problem to pick up the necessary ingredients while shopping for the other members of your family. Whether you shop at Walmart or Whole Foods, one thing is certain: the quality of the raw ingredients you will buy in human grocery stores is far higher than what is used in most commercial treats.
Making dog treats is amazingly simple. No special equipment is needed. You can use a dehydrator for dehydrating if you have one; but all you really need is an oven, which you can use for dehydrated meat treats or baked, cookie-style treats. My oven uses natural gas, and can be used at very low temperatures (under 200 degrees). That is very useful for slow, even, and complete dehydration, which is what’s needed to make a good treat.
My oven is old, and has a pilot light, so I can even store my “ready to eat” treats therein. They will stay dry and not mold because of that pilot light, so they do not require refrigeration. Do not forget to remove them before preheating that oven for something else, however! If your oven lacks a pilot light, you will need to store your treats in the refrigerator or freezer.

After visible fat is trimmed, place the meat (which is usually about an inch thick) flat into a pan of boiling water until it firms up. This step is not essential; but it speeds the dehydration process, and makes it less messy as well. Cut the firm meat into cubes, between 3/8- and 1/2-inches square, and then place the cubes on a cookie sheet, not touching each other. Put the cookie sheet into the oven at an ideal temperature of 150° - 200°F. Check the treats every half hour or so, move them around on the cookie sheet, and if there is a lot of liquid on the cookie sheet, drain it off. The treats need to be really, really dry; as dry as kibble; moisture is your enemy.
You can use a food processor or hand mixer to combine canned pumpkin and lightly boiled liver. If you don’t have time to bake the treats right away, store the combined “dough” in air-tight containers in the refrigerator or freezer.
I store the dehydrated treats in food-grade chewing gum dispensers that snap open easily for access. That way, they do not defile my pockets! And the dogs can’t immediately tell I’m carrying treats.
I can’t estimate what these treats cost someone else to make; I figure my out-of-pocket cost is $3 for the meat, which leaves me with an estimated 6 oz. of treats, after trimming and shrinkage. I have to allow for energy costs, so the true cost is higher than 50 cents an ounce; and if the meat is $3.50 a pound on sale, that increases the price, too. But I still think it’s the best bargain in town, and encourage you to try it.
Here’s a more complex recipe, with two ingredients. Don’t worry; it’s still simple. I came up with this recipe for baked liver-pumpkin cookies when I found that feeding liver-only treats often causes loose stool. Many people wish to avoid feeding grains, but to cut the effect of the liver, something had to be added. Pumpkin functions well as a binder and is palatable to most dogs, to boot. It’s just too good to be true that pumpkin acts to firm canine stools if they are too loose, and to loosen them if they are too firm; it’s the perfect companion ingredient for liver.

Try one or both of these two recipes. You have nothing to lose but your worries about potentially harmful treats.