My dog started limping about two days ago, with no noticeable injury. He was still pretty active. Today, however, he is very depressed and won't eat. Also, a few months back, a dog we had temporarily, had the same symptoms, but was returned to owner before diagnosed. What are the symptoms from spider bites or possiby poison plants?

I wish I knew the answer. My dog developed a limp about two weeks ago. And he's gone through the past several days not very interested in his food. I hope someone knows the answer, please.