Very clear how to use it.
Fine in Chrome Windows 7.
Not so fine on Galaxy ACE standard software internet access thingie. Page loads fine, choose a pet fine, info displayed fine. Click 'Back to pet list' and sweet fa happens.
Using Dolphin Browser HD on a HTC Sensation there's an odd issue. I'll try and screen shot it later.
Basically, you select a pet and it works fine. Go back and it works fine, but if you scroll down Dolphin does a thing on all pages where it hides the tab bar of the browser to give more screen space for the page. When you select a pet in this stage the pet name is hidden because it's in the space where the tab bar has reappeared but the page hasn't scrolled appropriately. It's definitely a Dolphin issue, but maybe worth noting.