The 4-H curriculum starts at grade 3 and goes to grade 12.
There are a number of great books that are available on Amazon as well. From coloring books that are quite detailed and labeled. We have a few of these ourselves, and more books that can help your child get ready for their future.
Color your way to a complete mastery of veterinary anatomy.
Animal science curriculum for your homeschooling might not be a one and done boxed curriculum idea but there are a lot of options for you and your child to learn from.
I have found these great options that we have really enjoyed using that you and your kids might also enjoy using in your homeschool this year.