I believe the fansite Subetalodge has a collections tracker that you could use to see what you still need to read/eat/collect/etc.!

With regards to your pet's foods eaten, go to your "Pets" page (just click PETS, don't go to that specific pet's profile), then click the "View Foods Eaten" from that page. That will update your trackers.

I think HQ was a different site entirely!

Hover over the Personal tab, then click Pets. From that page, click "View Food Eaten" next to your feeder pet. Viewing that page updates your trackers (for the Achievements, etc.) Collection-related achievements all use trackers which are updated by viewing the appropriate page. :)