Call Tractor Supply (Fort Pierce) or Petsmart or Petco. Ask when their FREE clinics are for shots, etc. Please contact us again if you don't find anything. There might be other ways of paying. Awesome that you are taking care of pets!!
You could also try the Rescue Group on Oleander. I hear they have rock bottom prices and offer inexpensive clinics they sponsor on weekends.
They don't really go by income. What they usually do it's a package that includes: exam, shots, spay for $120.
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