Large Animal Internal Medicine and Ophthalmology
Making an Appointment
Appointments are available for routine conditions, and emergency services are available 24 hours a day, 365 days a year. Please call 610-444-5800. Appointments may be made by the owner, trainer or referring veterinarian.

Large Animal Internal Medicine
The Internal Medicine Service is comprised of specialists in large animal internal medicine who are recognized internationally for their expertise in the diagnosis and treatment of medical disorders of all large animal species. These specialists diagnose and treat animals with medical problems including neurologic, respiratory, gastrointestinal, muscular, infectious, hematologic, renal and endocrine disorders. Board-certified dermatologists are available by appointment to consult on animals with skin problems.
Ophthalmology
The Ophthalmology Service at New Bolton Center provides complete ocular examination and diagnostics including slit lamp biomicroscopy, tonometry, ophthalmoscopy, ocular ultrasound, and electroretinography. For patients requiring intensive treatment and close monitoring, hospitalization is available for round-the-clock care. The Ophthalmology Service treats eye conditions such as corneal ulcers, Equine Recurrent Uveitis, cataracts, and glaucoma. A full range of ocular surgery is offered for conditions including lid lacerations, deep corneal ulcers or perforations, periocular tumors, and cataracts.
Clinicians
- Ray Sweeney, VMD, Section Chief, Diplomate ACVIM (LA Internal Medicine)
- Rose Nolen-Walston, DVM, Diplomate ACVIM (LA Internal Medicine)
- Jon Palmer, VMD, Diplomate ACVIM (LA Internal Medicine)
- Amy Johnson, DVM, Diplomate ACVIM (LA Internal Medicine; Neurology)
- Mary Utter, DVM (Ophthalmology), Diplomate ACVO
- Kathryn Wotman, DVM (Ophthalmology), Diplomate ACVO and ACVIM
Residents
- Michelle Abraham, BVSc, BVMS
- Joy Tomlinson, DVM
- Emilie Setlakwe, DVM
- Laura Johnstone, BVSc
- Chelsey Miller, DVM (Ophthalmology)