As with any other optional subject, there are both pros and cons associated with the animal husbandry and veterinary science optional. Go through the pros and cons of the subject and then evaluate your own strengths and weaknesses vis-a-vis this subject and then come to a decision regarding your optional. 

Pros of Vet Science:

• Familiarity – first of all, as a graduate in the subject, you would have studied the subject for 5 years and would be familiar with the concepts. If you take up subjects like pub ad or geography, you would have to study them from scratch.
• Syllabus – the syllabus for animal husbandry and vet science is well-defined and precise. There is no ambiguity.
• Marks – this is a scoring subject as it is a science and there is no room for interpretation here. Also, you can score easy marks through diagrams and pictures.
• Static subject – animal husbandry and veterinary science is a static subject. There is no dynamic component as such here and this leads to the next point, which is the kind of questions asked in the exam.
• Repetition of questions – about 80% of the questions asked in the papers are direct and straight-forward. Hence, if you go through the previous UPSC question papers diligently, you should be able to predict questions and in any case, know the important areas to focus on.
• Competition – you will face far less competition in this paper compared to the more popular optional.

Cons of Vet Science:

Now, let us go through the negatives of this optional subject.

• Coaching for this optional subject is hard to come by
• There is hardly any UPSC-tailored study material available for this optional.
• It is also difficult to find a mains test series for this optional subject.