Join Date: Apr 2008
Location: Orange County, NC
The biggest signs are not eating or drinking, so if your horse is eating and drinking, I wouldn't worry.
As far as plants, as My Beau said, they will generally avoid them unless they have nothing else to eat and start foraging for food. There are exceptions, though, e.g. red maple leaves in the fall, so you do want to keep an out for plants poisonous to horses.
....and I've never seen a horse that would eat anything that smelled like bug spray.
Allergies and eye irritations are common this time of year.
Normal body temperature is 99 - 101 F.
The pulse rate of an adult horse at rest averages 30-40 beats per minute.
The average respiration rate of an adult horse at rest is 8-15 breaths per minute
On the sixth day, God created the Quarter Horse.
On the seventh day, he Painted the good ones.