I have a 5 year old Shih Tzu who weighs about 10 pounds. She has muscle spasms that affect all 4 limbs every 2-3 months (sometimes longer apart). When the spasms occur, her extremities stick straight out, she starts shaking, and she breathes heavily. They last for 1-2 minutes, and she's fine afterwards. She's also had a slipped disc twice, and was on pain meds, antiinflammatories, and cage rest when they happened. I've taken her to the vet several times because I'm worried she may be developing IVD disease. He told us that because she acts fine afterwards and does not have any pain or bowing in her back (except for during the spasms), that she is fine right now and further investigation (i.e. x-rays, MRI) isn't warranted. He gave us Previcox to give her when her spasms occur and told us to not allow her to jump, especially off of things. Should we push harder for more investigation? We have been following his rules, but she still has the occasional muscle spasm. It's so hard to see her in pain... I just want to make sure I am doing all I can. Thank you!