My stepmom has a red heeler mix that is 11 years old. She was hit by car about a year and a half ago and has a few fused vertebrae near her tail. She has trouble walking sometimes and today one of her legs got tied on her lead and she was stuck under the house for unknown hours. Now her paw is 2x bigger than the other one and she can't put any weight on it. My stepmom has been debating putting her down or not but we are wondering what we can do for her leg right now or if its serious. We know that we will have to go to the vet if this doesn't clear up but just wondering if anyone has any experience with swollen legs.