Are all four of your dog's legs shaking, and they are acting as if they are ill? If so, this could be because where the dog has ingested something hazardous and is having a bad reaction. This is a serious reaction and condition and you want to call your veterinarian if this doesn't subside within a few hours.
Sometimes legs will shake from old joints, but if this came on suddenly and your dog is drooling, lethargic and has a loss of appetite, it isn't old age. Here are a few of the things that you want to do to see if you can find out what the dog ingested, or what type of trouble they are in.
Check the House
You want to check around the house for any spills, open containers, or trash. If you find that the dog may have licked something up, that they could have drank out of a toilet, or you know that they ate something in the house, call the vet with the evidence that you find. If you know that it's toxic you may want to rush your dog in right away.
Investigate the Yard
Did you see your dog out wandering around the yard, or maybe eating grass? Dogs eat grass when they want to calm or settle their stomach, and this could have been a sign that they ingested something toxic.
If you find piles of vomit in the yard, or stool around the property with blood or worms in it, get to the veterinarian right away. Don't hesitate to take samples of the stool.
Monitor Your Dog's Vitals
Has your pet drank water throughout the day, or eaten the food in their bowl? Are they breathing heavy or struggling to get up and move around? These are all signs that they are in trouble. Check to see if their heart race has increased, if they are trembling while they are resting, and report it all to the veterinarian.
You don't want to rush for an emergency visit if you think that your dog is alright, but if their vitals are declining after watching them for a few hours, you want to take them in to get the veterinarians opinion. Your dog may have some type of flu or virus, they could need an IV treatment or other care. The sooner you get them in the sooner you can have peace of mind. Visit a local pet hospital for more information about what to do if your dog has eaten something toxic.