Toddler discipline when safety is concerned?

I have an almost 2 year old who I stay home with. She is considered advanced for her age (knows alphabet, can count to 5 in English and Spanish, uses pronouns correctly etc) I also have a small horse farm. She seems to be an animal lover and enjoys going out with me to feed and take care of the animals. However, I am at times afraid for her safety and she just doesn't listen to me about 50% of the time. Ex. she likes to chase our ducks. The 2 males don't care they waddle away but the female I fear will rip her a new one. She also tries to go in with the horses, which I don't allow but I must physically restrain her or she just will no matter what I say. If she does something she's not supposed to do I give her the option of me carrying her for awhile or she can hold my hand. If she continues to do what I tell her not to do we go inside for awhile. Anyone, especially something with experience having a toddler around different animals have any suggestions.