Lately Tatum has been doing something very weird and I cannot for the life of me figure out why she is doing it. She doesn't do it every single day, but lately she IS doing it more often than she used to, which was only once in a blue moon.
She will go down on her front two legs, and stick her little butt up in the air - then she will get up and walk (kind of fast) a few steps and either do it again (go down on her front two legs) or she will just totally lay down all together. This will process repeat over and over again for a while. Now don't get me wrong, she isn't falling down or anything like that - she CAN control it...she just does it on her own. And when she is doing this stuff, she doesn't want to be held or really touched even - which is very unlike her. She doesn't cry out in pain or anything - her breathing is fine and all that....but she just does this weird thing and I cannot figure out WHY she's doing it.
I know she isn't just being "silly" either, because she is doing it now and I tried to give her a treat and she didn't want it - and trust me, that is sooooo NOT Tatum AT ALL. Right now she is laying down (all the way down) and her head is down also and I can just tell that she doesn't feel good or that something is wrong.
Could this have anything at all to do with the fact that she has a grade 3 Luxating Patella in both back legs??? She does limp when she walks and when she runs she holds her back left leg up completely off the ground.
I just cannot figure out why she is doing this and every time she does it, it makes me so nervous and scared because I feel like something is wrong and I have no idea what to do to fix it

Please help!!