Most Beagle are on alert even when resting and can have quite a bit of energy, however if a Beagle is pacing a lot, cannot seem to settle down, keeps looking around or seems on edge, this can defiantly be classified as acting strange and due to this sort of behavior, some even refer to this as acting paranoid.
While there are many random elements that can cause a dog to act this way, for an acute episode the most common reason is a physical discomfort. And with dogs, the most typical issue is an upset stomach.
A Beagle may have eaten something that disagreed with his stomach or can even have a canine stomach bug due to a virus or bacteria. When a dog needs to vomit or if his stomach hurts, it is very common to pace, act anxious and/or be unable to relax and lie down.
Some owners have found that if they let their Beagle outside, he or she will eat some blades of grass to induce vomiting
and will feel better almost immediately. Even if a Beagle does not throw up, minor cases of digestive issues are often self-limiting and resolve on their own. If there are other signs such as nonproductive dry heaving, lack of appetite, trouble with stools, if the strange behavior worsen or does not go away after 24 hours, it is recommended to call the veterinarian.
You will also want to keep an eye on the Beagle's abdomen to take note of bloating, which can point to bloat, a dangerous and sometimes fatal condition that requires emergency medical care.
Chronic issues: If a Beagle has been acting odd and restless for days
or even weeks without showing any other signs, this may be an element in the environment that is causing him to be on alert round-the-clock (more ahead) or it may be a health issue that is causing internal pain without manifesting outwardly.