Feeding animals, Part II

Hi,

We have said that one must feed animals that are in his care.

On Shabbat, though, one who feeds animals must take care to avoid:
1. Personally performing melachah [prohibited tasks], such as sifting or measuring the food, or trapping the animal;
2. Setting up his animal to eat muktzeh items, such as grass that was uprooted on Shabbat, lest one forget and handle the muktzeh items himself;
3. Strenuous activity.

(Aruch haShulchan Orach Chaim 324)

Have a great day,
Mordechai