Ohh, i see what you mean now.
Since you mentioned "Frontpage" i thought you are talking about the Virtuemart Frontpage. Because Frontpage is a specific page in the Virtuemart Component. Anyway..
Your problem is "switch" button doesn't work in the category browse page. I just noticed it in this URL:
www.sano-pets.com/index.php/dry-food-dog/puppy-junior-dog.html
The problem is because of the jQuery conflict issue.
Please check these parameters in your Virtuemart Backend:
VM Backend > Configuration > Checkout
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VM Backend > Configuration > Template > (scroll the page little bit down and you will see this section below)
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Please check these 2 settings. The Conflict issue will be gone and switchVIEW button will start working.
Regards.
Support & Development.