Using the phrase, '3 girls' could be problematic for a few reasons. It doesn't have a ring to it. However, let's see if we can think of something that will be a starting point.
I don't know your heritage but you could use
tres niñas or also an Indian word meaning daughters.
Could you make a word from their names? Here's an example.
Charlamay could by Charlotte, Lauren, Amanda.
To this, you could add the word, farm, homestead, place, etc, or just leave it as a single word.
Also, your daughters will be women and the term girls may sound belittling in the future. An empowering word in your farm's name might be suitable but you don't want it to sound dated. I would stay away from buzz words such as 'boss babes' etc. and opt for something like Trailblazers.
Using the animals in the name isn't a good idea unless you are specifically wanting to breed them for business purposes. Farms are evolving so it's important to select a name that encompasses something permanent.