Hi, I am Dr. Peter and would like to help.
1- Does the shaking, drooling and unable to get up happen all at once?
Ok, well in order for me to tell you what is going on with your dog I needed information. Up to know, you have paid for nothing. There is no charge for info request.
Seems we have gotten off on a bad start. I will opt out and allow another expert to help you.
Welcome to Just Answer!
I'm sorry you have had such a long wait to get another response to your question. I just logged on and saw your question and have replied immediately.
I would like to help you and Buddy with this question, but need a bit more information in order to better assist you.
When did all this start - hours, days or weeks ago?
Is your Beagle on any medications at all?
What you are describing with Buddy could possible be a partial motor seizure – also called a “petit mal” seizure.
Here are some videos of this type of seizure:
Here are some links to more information about mushrooms and dogs:
Pets ingesting marijuana become incoordinated and begin stumbling. Most become quite lethargic. Some may experience hallucinations. The danger with marijuana is that vomiting is common, and if the pet is profoundly lethargic and begins vomiting, aspiration of the vomitus into the lungs can lead to severe breathing problems and even death.
What you are describing in your dog with profuse drooling could happen if he picked up a frog. This is because of the really horrible taste from the amphibian’s skin. It is irritating to mucus membranes and causes extreme salivation and sometimes vomiting.
It works well (from the frog’s perspective) at making the dog spit the frog out!
That said, there is a toxic toad in the USA and one in Australia, too. In the USA it is the Bufo Toad, and in Australia, it is the Cane Toad. In the USA the Bufo Toad is found in South Florida and South Texas, and also further south into central and South America.
Here is more about it:
It is unlikely that your Beagle got one of these, however. Probably he might have just picked up a regular frog or toad, and found that they taste horrible!
Instructions here: http://www.petplace.com/dogs/how-to-take-your-dog-s-temperature/page1.aspx
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If you need more information, just click on reply and I will still be here to provide it. The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would strongly advise contacting your regular veterinarian. Fiona