There are three basic types of OC pepper products---pepper spray, pepper foam and pepper gel.

Pepper spray has been around the longest, and is the least effective.

Pepper foam and gel are considerably more effective, and if used properly will ruin virtually any dog's day.

Regardless of which type you use, shake the cannister vigorously for several seconds each day.

Don't store cannisters in your car for long periods of time during the summer or winter.

The effectiveness of pepper products can decrease over time. Replace cannisters with brand new ones at least every two years.