Sue McDonnell, PhD, Certified AAB

Sue M. McDonnell, PhD, is a certified applied animal behaviorist and the founding head of the equine behavior program at the University of Pennsylvania's School of Veterinary Medicine. She is also the author of numerous books and articles about horse behavior and management.

Articles by Sue McDonnell

Determining Personality

How can a horse purchaser check out elements of a horse's character at the purchase exam? Read More

Rushing a Mare During Breeding

What might be causing a stallion to mount a particular mare early, and what can be done about it? Read More

Feeding Time Pawing

Do you have any suggestions for stopping a horse from pawing while he is eating his grain? Read More

Horses Afraid of Other Species

We were told that it's dangerous to have pigs with horses. Have you ever heard of this? Read More

Rude for Food

How do I change a colt's rude behavior at feeding time without scaring him? Read More

Sudden-Onset Cribbing and Headshaking

My pony started tossing his head and cribbing at about the same time. What could cause this problem? Read More

Fear of Cows

My horse is terrified of cows. Is there anything I can do to help him? Read More

Unpredictable Fear

Learn what "sacking out" is and whether it might work for a mare with unpredictable fear. Read More

The Messy Mare

Why does my mare return to her stall to urinate and defecate when she has a large run and could do so outside? Read More

Horses That Are Bonded

I've read that uneven numbers aren't good due to pair bonding. Is this true? Read More

Trailer Troubles

Do you have any recommendations for how we can help a horse overcome a trailer loading problem? Read More

What's In a Yawn?

Is yawning an indicator of stress in horses? Read More

Trailer Loading Lessons

What techniques I should use during a trailer loading lesson with a naive filly? Read More

Recognizing Humans

Is it common for horses to respond differently to different people in the same situation? Read More

Can Horses Think Through Problems?

Do horses have the capability to think through a problem, like unlatching a gate? Read More

Age to Breed a Colt

Our coming 2-year-old acts like he is ready to breed. How young is too young to breed a colt? Read More

Water Bucket Blues

Why do horses tip water buckets, defecate in waterers, and/or dip hay in their water? Read More

Separation Anxiety In Horses

Learn what predisposes certain horses to separation anxiety and what we can do to prevent it. Read More

Controlling Cribbing in Horses

How can I work with a cribber so he can stop wearing his cribbing collar? Read More

Biting and Snapping Pony

How should I handle a pony that tries to attack people when they enter his stall? Read More

Trailer Unloading Problems

Why does my horse bolt out of the back of the trailer as soon as we start to open the back gate? Read More

Drinking Water Temperature

Why might our horses drink from an ice cold creek or tank rather than from the heated water buckets? Read More

Rolling in Dirt

Almost every time we let our horses out of the stalls after feeding them, they roll. Why? Read More

Can't Catch My Horse

Learn how to deal with a horse or pony that doesn't like to be caught in the pasture. Read More

A True Gelding?

Many true geldings retain stallion-like behaviors. Read More