Re: beagle ????
I would say to make sure the dog will listen to your basic commands first and foremost.
Then I would box trap a wild rabbit or get your hands on a domestic one, put it in a cage and let the dog sniff at it. If the dog has some hunt in him then it should start to scratch at the cage and bark and just basically go crazy trying to get the rabbit.
Take it to a field where there is a treeline close by, then let the dog go crazy at the cage again and then let the rabbit loose. Hopefully the dog will get a sight chase in, until the rabbit hits the cover and the dog will lose it, but then he should start using his nose to find it.
If he shows interest then I would either take him out and find him rabbits by himself or run him with another experienced hound.
"When the mind fails to comprehend, the body must be punished" -3rd Battalion,Parris Island