Did hysilophodontids like dryosaurus have feathers.

Remember what I said? About posting more than just one question? Yeah, do that. Post five or six questions at once instead of one at a time. That way, the topic isn't annoyingly short. 

Anyway, possibly a quill or something in that manor, but not a full covering if feathers if you ask me. 

Is it good now?

That's a bit better. Perhaps number the questions too so then we can number our answers, makes it more convienient. 

I doubt Dryosaurs had a strong bite, they were more of the kind to outrun a predator as opposed to overpowering. 

If they did have quills, it'd be display purposes only. Feathers alone wouldn't do much damage. 

I agree with Mr. Happy. They probable had a few quills or proto-feathers, but that's all. They were probably only used for display and maybe intimidation.

As far as its bite force, it probably had a bite force only strong enough for ripping leaves peaces off of plants. However, I can see a Dryosaurus nipping at an attacker if cornered.

Personally, I say feather all the things. 

Anyway, Hysilophodontosaurus and its brethren probably had a small amount of quills, but as everyone else said, they probably didn't have any offensive capabilities, and were likely for show more than anything.

As for the bite, I must disagree. Although its bit would've been nothing special, it could likely snap a small therapods arm, although in a fight it would likely attempt to kick its assailant before it bit.

Another thing worth mentioning about its bite is that Hypsilophodon has some nasty dentition, and ornithischian dinosaurs were pretty muscular, a fact which often gets ignored due to therapod superiority complex and the fact that they aren't an armored tank like ankylosaurus.

TL:DR= Hypsilophodon is a very underrated dinosaur who no one gives enough credit. No wonder he's always mad.

Quills are possible. I don't think that there's enough evidence to come to a conclusion.

I believe ornithischians, at least the small ones, had down like proto-feathers. I posted an article here a while back about a small ornithischian discovered in Siberia that sported a thick coat of down like proto-feathers. Here is the link to the article if your interested:

http://news.nationalgeographic.com/news/2014/07/140724-feathered-siberia-dinosaur-scales-science/

This species lived in a colder climate so it's coat probably was much dencer then the average small ornithischian. I would say animals like Dryosaurus probably had a thin coat of down that was thicker when they were young.