Scent-driven, food-motivated, famously vocal
Beagles are pack hounds bred to bay while trailing rabbits. That temperament produces three specific crate issues: they bay when they want out (loud, low, carrying), they follow their nose over any barrier if given the chance, and they eat literally anything. The 30" crate fits most adults (20–30 lb).
Baying in the crate is not a training failure — it's the breed. What matters is never releasing a barking beagle, so the barking doesn't get reinforced. Wait for a genuine pause, even a two-second breath, before opening the door.