Which long-lasting snack is best for your dog? Here’s the rundown on five popular chews:

Customers cite this as their dogs’ favorite chew at the Union Square Petco, according to supervisor Fanella Fordyce. “They last a long time, and dogs go crazy for them.”

They’re also known as “pizzle sticks,” as they are made from dried, ahem, cow penises.

Nutrition: They are “more caloric” than other treats, says veterinarian Daniel Lauridia of Murray Hill Pet Hospital, who recommends just one a week.

Price: $4.59 for a 5-inch beef bully braid

Longevity: 20 to 30 minutes

Messiness: Keep this away from your good carpet. The stick gets stinky and wet as the dog chews.

This classic treat, a baked piece of cattle skin, is found in strips or bones in plain or flavored options. Unfortunately, some dogs might choke on these or swallow big pieces, causing digestion issues, says Christina Shusterich, a NYC-based dog behavior expert for NY Clever K9, who steers clients away from them.

Nutrition: They have minimal calories, but also minimal nutritional value.

Price: $10.99 for six 4-inch plain, bone-shaped rawhides

Longevity: Hours to a week

Messiness: Unflavored rawhide typically won’t give off a strong scent, but it can make a soggy mess.

Some dogs are drawn to the smell of marrow, but not all will chew a horn or antler (often from an elk, deer, moose or water buffalo) until they crack it open. Lauridia gives these to his own dogs, but cautions that they might be too tough for those under 20 pounds. “There is risk for a fracture to the tip of the teeth,” he says.

Nutrition: Lower in calories than bully sticks, they also offer a small calcium and phosphorus boost.

Price: $12.99 for a small elk antler

Longevity: Days to months

Messiness: No smell or splintering makes this a clean chew.

This hard-cheese chew made from yak or cow’s milk may not appeal to all canines. “We have a lot of bulldogs around here, and they really like it,” says Ignacio Morales, manager at Pet Central Chelsea.

Nutrition: High in protein but
also carbs — so reward sparingly, cautions Lauridia.

Price: $9.99 for one Himalayan Dog Chew for a dog under 35 pounds

Longevity: 30 minutes to hours

Messiness: Minimal odor, but often leaves behind crumbs.

Marketed as a “dental” chew, this treat made of oat, wheat, vitamins and minerals carries the Veterinary Oral Health Council (VOHC) seal for removing tartar and plaque. “It’s good for the teeth,” Fordyce sums up.

Nutrition: With 95 calories, Lauridia recommends serving less grub at mealtime if you offer a treat a day.

Price: $2.29 for a single “regular” size Greenie

Longevity: 3 to 10 minutes

Messiness: There’s no mess as dogs eat these quickly, and it freshens breath.

*Supervision is recommended for all chew treats. Prices based on local options.