Most (not all) treats you find in grocery stores will be garbage. Read the label. Also any edibles Made in China is up for questioning. You have to be very careful. I only go into the pet section at grocery stores for beds, toys, and clothes
I would never buy anything made from Hartz, Milkbone, Purina, and the list goes on.
I think a few things made from Newman's Own is semi-OK and that brand is sold at grocery stores. Like I said, read the label.
Snick & Viv