Yes, a ferret can be walked on a leash like a cat or a dog. But it’s best to keep the walk to an average of 10 minutes at a time. If he’s a young ferret, you can go up to 15 minutes of walking.  Just make sure you let him rest for a couple of minutes in between. However, if your ferret is old, try not to go over 7 minutes. Long walks may cause them pain in their bones and joints since old ferrets are susceptible to bouts of arthritis.