There are various study groups and coaching institutes that offer guidance for the Animal Husbandry and Veterinary Science optional subject for the UPSC exam. These institutes provide comprehensive coaching and study materials to help aspirants prepare effectively for this subject. Here are some popular options:

1. Vajiram and Ravi: Vajiram and Ravi is a renowned coaching institute known for its UPSC preparation courses. They offer coaching for Animal Husbandry and Veterinary Science optional subject, along with other subjects. Their faculty members are experienced and provide in-depth guidance to students.

2. Drishti IAS: Drishti IAS is another popular coaching institute that provides coaching for various optional subjects, including Animal Husbandry and Veterinary Science. They offer well-structured courses with comprehensive study materials and regular mock tests to assess the progress of students.

3. Khan Study Group (KSG): Khan Study Group is known for its quality coaching and guidance for UPSC aspirants. They also provide coaching for Animal Husbandry and Veterinary Science optional subject. Their faculty members have expertise in the subject and provide personalized attention to students.

4. ALS IAS Academy: ALS IAS Academy is a reputed coaching institute that offers coaching for Animal Husbandry and Veterinary Science as an optional subject. They have experienced faculty members who provide comprehensive guidance and support to aspirants.

5. EduRev: EduRev is an online educational platform that offers study materials, video lectures, and practice questions for Animal Husbandry and Veterinary Science optional subject. They have a vast collection of resources that can be accessed by UPSC aspirants to enhance their preparation.

In conclusion, there are several study groups and coaching institutes that offer guidance for the Animal Husbandry and Veterinary Science optional subject for the UPSC exam. These institutes provide comprehensive coaching, study materials, and regular assessments to help aspirants achieve success in this subject.