Toy Poodle not feeling good

Question
Just in the last couple days, my poodle has been low key.  He is not fixed, and is almost 3 years old. I know something is wrong, but other than quivering a little, there are no signs of any problems.
He's eating, he is urinating and pooping fine, drinking water. But I know he is in pain somewhere. I was thiking about giving him some baby asprin, like Tylenol, but do not know if this is safe.

Answer
Don't give him Tylenol or other modern OTC pain killers.  They could kill him.  You can give aspirin, buffered is better.  Be very careful, the dose is 5 mg per pound,so you may have to break up even a baby aspirin.  

The best thing is to take him to the vet and find out what the problem is and get an effective remedy.  If he is sick, he may need antibiotics, not aspirin.