My dog was recently hit by a pickup truck. The vet prescribed amoxicillin for infection, denamarin for his bruised liver and tramadol for his pain. He also has bruised lungs & ribs, his back right leg was degloved & now sutured, his front right leg is painful. All considered he's doing alright. It is uncomfortable for him to lay on right side. He spends much of his time resting. I have introduced arnica& hypericum for inflamation & bruising. His food is all natural with turmeric added. Is it ok to give him feverfew as well? Are there any interactions between tramadol & feverfew? Does tramadol cause constipation? I started giving him probiotic, do you recommend anything else? Thank you!