There are several online forums and discussion groups where you can interact with other students studying Animal Husbandry and Veterinary Science for the UPSC exam. These platforms provide a great opportunity to connect with like-minded individuals, exchange knowledge, discuss study materials, and seek guidance from experienced candidates. Here are a few popular platforms:

1. **EduRev**: EduRev is an excellent online learning platform that offers a wide range of study materials, practice questions, and mock tests for various competitive exams, including the UPSC. It also features a discussion forum where you can interact with other students preparing for the Animal Husbandry and Veterinary Science optional subject.

2. **IAS Forums**: IAS Forums is a dedicated platform for UPSC aspirants. It has a section specifically for optional subjects, including Animal Husbandry and Veterinary Science. Here, you can find threads related to study materials, syllabus, strategy, and previous year question papers. You can also post your queries and participate in discussions with fellow students.

3. **Quora**: Quora is a popular question-and-answer platform where you can find numerous discussions related to the UPSC exam and its optional subjects. There are several topics and threads specifically dedicated to Animal Husbandry and Veterinary Science. You can follow these topics, ask questions, and engage in discussions with other students and experts in the field.

4. **Facebook Groups**: Facebook has several groups focused on UPSC preparation. You can search for groups related to Animal Husbandry and Veterinary Science for the UPSC exam. These groups often have active discussions, study material sharing, and guidance from experienced candidates. Some popular groups include "UPSC Animal Husbandry and Veterinary Science Optional," "UPSC Veterinary Science Preparation," etc.

5. **Telegram Channels**: Telegram is a messaging app that hosts numerous UPSC preparation channels and groups. You can search for channels specifically dedicated to Animal Husbandry and Veterinary Science for the UPSC exam. These channels often share important study materials, answer writing tips, and conduct interactive sessions. Some channels you can explore are "UPSC Veterinary Science Optional," "Animal Husbandry and Veterinary Science - UPSC/IAS," etc.

Remember to be an active participant in these forums, ask questions, share your knowledge, and contribute to the discussions. The collective learning experience can greatly benefit your preparation for the UPSC exam.