Michigan State University: Michigan State starts rotations 2nd semester (early January) of 3rd year.
Mississippi State University: starts third year clinical rotations (Equine and Food Animal (6 weeks each), Radiology, Anesthesia, Lab Services (4 weeks each), and Small Animal Surgery, Community Vet Service (6 weeks each)) the day after your second year finals are over. You get one 12 week block as a break to take at some point during your third year. 4th year is made up of mostly Advanced Clinical Rotations, Externships, Electives, and Graduate courses - you can choose.
SGU: You have rotations at the small animal clinic during your fifth semester in the morning (in addition to sx lab and others, and classes in the afternoon). In your 6th semester you have large animal ambulatory rotations, small animal emergency rotations, and labs in the afternoons/evenings every day in addition to classes in the morning.
University of Georgia: UGA starts March of third year I think. We have third years now, so I know it's the that year, but I am not completely sure if it is March. But I think so.
University of Illinois: You do clinics 3 times during your education:
1. First 8 weeks of first year. (minimal responsibility)
2. Second 8 weeks of second year. (minimal responsibility) (first 8 weeks are in the classroom while first years are in the clinics)
3. Start in March of third year and go through your fourth year including third year summer.
University of Missouri: Missouri is a 2+2 program.
University of Pennsylvania: Penn has a couple options. You do 2.5 years of regular classroom and then you can either:
1. Do "small animal block" and "large animal block" which are all electives in the classroom. Large animal block is 3rd quarter and small animal block is 4th quarter.
2. Skip one block and you are in clinics for that quarter.
3. Skip both blocks and do "early entry" into clinics halfway through your third year. They emphasize that they cannot guarantee early entry but everyone that has asked so far has been granted early entry.
Western University: 2+2 program
RVC: We start fulltime rotations February of our 3rd year (in the 4 year program). However during the 2nd year you are required to do 10 weeks of clinical experience in various vet practices.