Yes, it's normal, though some pups have less problems with it than others. Unfortunately, most shelter clinics are working on a shoestring budget and don't offer pain medications. Your vet can help there, but there's also a school of thought that says that if they are given pain meds, they won't self limit their activity. If they don't feel the pain, they are likely to do something that would injure themselves. But please talk to your vet.
And thank you for adopting.
