At the end of Httyd 1, Toothless was inside the house and sitting there like he'd been there for quite a while and had gotten used to the place so chances are he never left Hiccup's side post the battle with Red Death for the time his best friend had been comatose. Also the fact that Stoick fully entrusted Toothless with Hiccup's safety and wellbeing that he would leave the house without worry.
Point in case, Toothless probably only left the house for brief moments and the villagers haven't seen him much (and they're too apprehensive to quell their curiosity because that's a freakin' Night Fury in there guarding their unconscious heir), ergo they haven't gotten used to him yet. Accepted the dragons sure but as the series told, not in an instant and not 100 percent. They trust the dragon in there but it's still something to wrap their heads around.
Now, a random Berkian's perspective to Hiccup and Toothless' friendship and dynamic post Httyd 1 would be gold.
The bewilderment at how those two seem to communicate like they've been together their whole lives, the mini heart attacks when Hiccup snarks at the dragon they grew up fearing and Toothless snarls or roars back with teeth out and... rolls his eyes?? Oh... they're just bickering, the boy isn't about to die, calm down. The fucking jumpscares when those two show up like they just materialized from the shadows WTF aaand it was just Hiccup hiding from the chief. The befuddlement watching the boy and his dragon having a debate over which notebook to buy because Hiccup wants the one with better paper quality but Toothless wants the other because apparently it smells nice.
The villagers gradually get used to Toothless and how he integrated so perfectly into Hiccup's life but while the fear and confusion is gone, the awe at how connected those two are, how they understand each other better than anyone can possibly hope, never goes away-
"Hey, no- Toothless, give me back my notebook! I still need to- Hey! GET BACK HERE!"
A black form rushes through the square and towards the Great Hall, being chased by his angry best friend who was refusing to get lunch because he wanted to sketch down an idea for some invention.
I have this headcanon where wings will outgrow baby furies for a couple weeks until the rest of their bodies catches up to them. They're pretty clumsy during this period of time, gotta get used to the weight of their new extensions😋.
what you have to understand about dungeon meshi is that the entire conflict basically boils down to "every character is autistic but in ways that clash so catastrophically horribly that everyone thinks everyone else is a nuclear-level threat"