The type of beagles that are unfortunately used in laboratories are not working-type beagles, though.
I had a perrycroft beagle as a kid. The perrycroft kennels supplied puppies to the animal research trade. They went bust and Beagle Welfare found themselves with a couple of hundred beagles to rehome. One of them ended up coming home with us.
She could only have been pure-breed beagle (nothing else in the breeding programme) but she looked distinctly different to one. Noticably taller and lanker - more foxhound shape - with a much pointier face than the KC registered shithound currently snoring and farting on my lap. And her eyes pointed in different directions.
That's a long way of saying that, unless you're consciously breeding and selecting for breed standard, you do get a greater variety of shapes and faces than us KC beagle owners might expect. Hunting beagles are different again, and there are distinct differences between different packs as the huntsman selects what they like for their particular terrain.
@KenAddams I think you've got a purebred beagle, but one that's been bred without the care and attention to select back to the physical appearance that wins shows that might come with a puppy from a KC breeder. It's fair to say she'd never win any prizes in the ring, but she's yours, and I'm sure she's the most beautiful beagle in the world in your eyes. As she should be.
Exploding unicorns is also a fine beagle trait. She's clearly got all the right instincts 