Where's the love for senior dogs?

I am a 6th grade student living in Northern California and I want to raise money for the amazing foundation,  Muttville the senior dog rescue who care for all dogs and try to have senior dogs adopted. My reason to do this is that senior dogs don't get adopted as much and sometimes even abandoned. I want to raise $2,000 to give 20 senior dogs vaccines and medications. I hope to raise this by MAY 7TH. My dog is my life companion and my best friend even though she is a large dog and is 6 years old I would never leave her. I feel horrible about the people who would abandon their dogs so I want to have these dogs treated so they are more likely to get a new home. I would be very grateful for any support you could provide.