It's not just children they under medicate, it is animals also. I had a dog that had a complete mastectomy and for a dog that is quite a huge surgery. I asked about pain meds and they told me that animals handle pain better than people. After she had been home one day I could tell that was not true. The doc told me to give her two Tylenol instead of one. I promptly took her to another Vet and he just about had a stroke. He put her on Demerol and got the name of the Vet that did the surgery. He called that Vet and chewed him up one side and down the other. Needless to say, my dog now has a new Doc.