No tests have been done. When this originally occured The Doc/vet looked her over, took her temp, listened to what I discribed she was acting like the last 2-3 days. she was actually acting fine at that point at the vets office. Doc said often an animal will hide symptoms and act fine at the Doctors office. but the morning of the day that I took her to the vet she was barely moving - very slow like severe artheritis and had a limp in the front right (passengers side) paw too. The day before she was slow moving like artheritis, but not as bad and no limp. She didn't want to do anything but lay around. didn't want to play, etc. But she still wanted to eat. He said because of the slightly high temp, the discription of how she was the last 2-3 days that she probably has some tick bourne disease. and that we could do a test, the tests are not perfect, but no mater what the results of the test are it will not change what he recommends which was 250mg doxycycline every 12 hours for 3 weeks. We started her on it and she was better than she had been in a long while. as in a slightly but noticable higher level of activity when playing, on walks, walking around the yard on a leash, etc than she had been in maybe 6 months or more. not that she was low activity before, but since she turned two last march or maybe even earlier durnign the winter, she seemed to mellow just a little from the puppy age. on the Doxy her energy was like that of when she was 6 months old again. but thinkfully, not the chewing or all day activity like she had back then. she was still the same, sleeps most during the day, etc just a little extra gusto when playing, walking, etc.