My 8 yr old chihuahua has been weak in his back legs for about a month. He's had problems w/ back spasms before and was having laser treatments but it seems like his back legs went numb. He started shots 2/wk, to arthritis meds and we had a CAT scan and they don't see anything. We had them re-run the Lymes test because we heard that could cause it, but they just called and said it was negative. I'm spoke to someone at work who said dogs can get Multiple Sclerosis, but when I looked it up, it seems it's diagnosed only in german shepherds.
I don't know what to do. He still wants to run and play, like he doesn't feel anything is wrong, but his legs will stay too far apart, or his paws will face the wrong direction/be flipped under and he doesn't fix it. He's also losing weight.
Sorry so long. The vet hasn't called back w/ any other suggestions.