What Would Cause My Dog To Suddenly Act Lethargic And Shaky?

There are a number of things that could be causing your dog to act this way and it is unlikely that anyone on the Internet is going to be able to tell you exactly what is wrong. The only way that you are going to know for sure and have your dog treated correctly is to take it to your vet as soon as possible because simply posting the symptoms on the Internet is not enough. A vet will be able to properly examine your dog to determine the root of the problem.

If your dog is experiencing extreme pain or discomfort then this is what could be causing it to act lethargic and shake. However this is a rather vague cause. A deeper possible root of the problem could be trauma or injury to the musculo skeletal system, gastro-intestinal problems, metabolic such as liver or kidney issues or a problem with the neurological system.

It could also be the case that your dog has been exposed to harmful toxins that could have caused some internal damage, however this is not as common as some people think so don’t count on this unless it is confirmed by your vet. A low glucose level in the blood could also be causing these symptoms, it is just like low blood sugar in humans. However this is not a very common condition in adult dogs so unless your dog is a puppy then you can pretty much rule it out.

Don’t believe that it is any of these causes before you speak to your vet because you will just worry yourself even more. The only thing you can do right now is to take your dog to the vet and let them figure out what it is. Once they know, they will be able to treat it accordingly and make your dog fit and healthy again.

Have this dog examined by a veterinarian.  There are several things that can cause lethargy and trembling.  Pain or discomfort is a common cause of lethargy and shaking.  This is very vague and can be related to many body systems--the musculo-skeletal (trauma or injury), gastro-intestinal (nausea, dietary indiscretion), metabolic (liver kidney issues), or neurological system.  Toxin exposure is possible though not as common as people think.  Low blood glucose is possible but not very common in adult dogs.  This is common in puppies and diabetics that have received too much insulin.
Consider environmental causes--is your dog afraid of thunder, are other loud noises related, or has anything changed that would cause stress or anxiety.
Your veterinarian will help you rule out these causes and help your dog.

Sometimes extreme temperatures can do this to a dog.  Give him a good rub down with a towel to get the circulation going again , and some fresh water .  Keep him indoors except to let him out to do his business.  He should soon be back to his old self .

Your dog may have been bitten by a poisonous spider or something or it has eaten or licked something else that's poisonous. Take your dog to the vet if keeps going.

It could be a blood sugar drop. You need to see a vet.

Scared out of mind!! Your dog may drool for varies of reason 1. Some breeds do drool 2. You may have some good food he or she might want. Your dog might be cold and thats why he or she shakes... I hope I helped you out a little!! :)