I was contacted by one of Lois's LJ friends, asking about to where one could donate in Lois's memory. The two foremost options that come to mind are:
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http://www.spayisrael.org.il/ This organization helps to spay and neuter street cats (and dogs, when needed), including mobile clinics. My mother (a veterinarian) is involved, and they are currently collecting donations for a mobile clinic that would run in the south, including Be'er Sheva, and it is to be in Lois's memory.
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http://www.cff.org.il/Articles.asp?Catid=104 The English page of the cystic fibrosis foundation in Israel.