mickey is starting to nip at my heels.

i found an article on the net but it relates more to a dog nipping at a persons' heels. maybe it will work with jo too. good luck

Question:
How do I stop my puppy from nipping?
Answer:
Until your pup is housetrained and trained to be mannerly with people, it is advisable to keep him on a 6 foot leash when you are supervising him in your home. This way he can't run about and get in trouble urinating or defecating in the house or chewing up your things, and you have an effective way of controlling him.

You can hold the leash or step on it as you watch TV or sit at your computer. Otherwise, the leash should be tied to a stable object. In either case, be sure to provide your pup with a well stuffed (with tasty food) chewtoy so he is busy doing something positive.

If your puppy nips you simply step on the leash or use it to gently hold your pup away from you as a time out. Wait about 5-10 seconds and then try to calmly interact with your pup again. Don't be surprised if this takes a good number of repetitions to be effective. Nipping is a normal and deeply instinctual puppy behavior. So, it may take a bit of time for your pup to learn it is inappropriate with people. But, letting your pup know that nipping means he loses access to you and everything else he wants is the most effective way to solve this problem.

from petmate