You can deduct all of your out of pocket expenses (including your shots) as cash contributions as well as 14 cents per mile for travelling by auto in the service of your qualified volunteer organization.
IRS Qualified Charity List
To report volunteer expenses in TurboTax:
Click My Account (Top right of your screen).
Select Tools.
In the pop up window, select Topic Search.
In the search bar, type in charitable contributions.
Highlight it and select GO, and follow the prompts.
See Tips for Taxpayers Who Travel for Charity Work
https://www.irs.gov/uac/Newsroom/Tips-for-Taxpayers-Who-Travel-for-Charity-Work
To benefit from the above, you must itemize your deductions.