Have found ferret checks on line, don't remember the company or site.
I have ferret checks myself, the Styles Check Company,
www.styleschecks.com, 800.356.0353
 
You would have to ask of they donate to shelters but most likely they
don't, is a business in tuff competition, price is what counts and
donations put them out of range in costs.
 
But, you could always order the checks, then use the first one to write
a donation to a shelter directly !  This way the shelter gets the whole
donation without deductions for operating expenses or other handling
fees.  Great !
 
Gordon, Byte-me, Nibble-ed, and Kodo
 
PS: Nib is still with me, have procrastinated the ugly job I have to do.
She has good days and the rest.  She is very close to the point now, but
I give her every moment of life she can reasonably enjoy.
[Posted in FML issue 4151]