Abandoned dogs- is there assistance with intial expenses?

A few months ago two very sweet dogs, a black lab and golden retriever were abandoned when some renters down the street moved out. We watched them hunt through the trash, chase cars, and freak out during thunderstorms- and decided to take them in. We spent days cutting out huge matted fur clumps out of the Golden, Bones, and invested in shampoos, quality food and any other essentials we could afford. They need to be professionally groomed at least once and looked over (shots, dewormed, general health assessment). The lab needs to be fixed. I have heard that there are clinics that have discounts or offer free services in these cases, but I seem to keep coming to dead ends…any advice- we have bonded with the dogs and want to make them well- but need help with the initial expenses.