Thank you for helping! I work with rescues. I've never knit anything for shelters, but I do want to recommend you make yourself available, or knit/crochet up a bunch of doggie diapers if you like. Especially male dogs' which they can tend to mark and people give them up to the shelter. And you can whip one up in a couple of hours for a small-medium dog.
My patterns are called PupPee, they are free. You can search for PupPee on my blog or see it on Ravelry here.