I was told that the booster can cause them pain and make them not feel well. My guy tolerated it pretty well...not any pain really...just a little sluggish for a few hours. The vet said it could be more painful depending on which combination the shots are given in.
I hope Coco feels better soon.
__________________ Horatio, my sweet boy. You aren't the boss of me...my Yorkie is. "Yorkie's are like peanuts...you can't have just one" Cindy Adams |