Suddenly RAW files are opening and looking pixellated?!

[Elana]

Hi Damien...so just today I noticed that some RAW files I was opening seem to have visible pixels...not sure if it's just my eyes though but I've noticed it in two RAW files I opened directly into Adobe camera RAW. 

Do you know what might be causing this? Screenshots to show you what I mean. On the baby one, when I zoom in one more, it seems to disappear. The baby one is a jpeg (not sure where I put the raw) but it's a huge jpeg. The first one is raw.

Thanks!

[Damien Symonds]

Any time you view at a non-standard zoom this is a risk.  Only use Cmd + and - keys for zooming.

[Elana]

Oh okay. Thank you!