I went to the shelter 2 weeks ago and brought home my new baby Millie. She is a sweet chi mix and is 10 lbs and 6 months old. We took her to the vet and she had a clean bill of health. She received her parvo vax and we were sent home with trifexis. After the parvo vax she slept more than usual for a couple of days. Today I gave her the trifexis and she has been very shaky. The shakes started about 2 to 3 hours after her trifexis dose. I read info online about how harmful trifexis can be and now I am extremely concerned and overcome with worry. Have any of you had the symptoms of shakiness with the trifexis? She also kept getting under blankets and such. She never does that either and it is far from cold in my home.