Hi Richard,
The hearts and CAPITALS certainly make you stand out in the listings.
In regard of John's point; is whether it would help if the word "CHARITY" were in the listing heading?
e.g. CHARITY MALTESE ADOPTION EVENT ... or MALTESE ADOPTION CHARITY EVENT ... or another permutation.
Or another phrase; e.g. 'Non Profit' or 'NPO'?
Given the rather 'austere' nature of the listings pages (beyond your control), I think you've done about as well as you can;
You tell people:
when and where
set their mind at rest with regard to health, etc.
you are a charity (I'm not sure about the "tax deductable" bit*)
you list the dogs available - I assume they will be there 'in person'?
You also have links to your website, facebook page and the Pepsi and Cola rescue - all of which work, I checked.
Hope that's useful, Dave
* Mainly because in UK it works the other way around; the income tax on what we donate can be recovered by the charity, adding 25% to what we give them, but not by us personally. However, if it helps people donate more in USA (because of a taxable income offset), then leave it there.