The Hut doesn't protect horses, other pack animals etc.
Only an issue if the characters are mounted or have pack animals, which is quite rare.
The Hut is active for a very specific time then drops - more intelligent predators could easily figure that out and time a very effective surprise attack.
No they can’t. If an intelligent predator comes upon a dome of force in the wilderness, they don’t know squat.
First, « intelligent predator » doesn’t mean knowledgeable about 3rd level wizard spells.
Second, even assuming the predator recognizes the spell, he doesn’t know if the dome was placed 5 minutes ago or 7 hours ago. Sitting around for 7 hours hoping for a meal generally isn’t a great idea.
Third, suppose the intelligent predator decides to wait. He won’t last very long as the party can just snipe at him from inside the dome which he can’t breach (or skirmish if he is outside the immediate range of the dome).
Fourth, in all cases, it is still better than then « a tent » , the martial alternative.
Fifth, even if the spell is less effective against intelligent predators, it is still incredibly powerful against everything else (including environmental hazards), that’s still extremely good for a class feature that costs you a single spell known and zero spell slots.
But more importantly - if the DM wants to mess with the characters when they are unprepared, they'll mess with the characters - Hut or no.
Pretty sure the DM’s role isn’t « to mess with the characters ».