Have 100% health - what have I done wrong?

Help it won't let me fight with my pet! There are four things to check when you pet isn't able to battle. First: Sometimes you didn't completely finish your last fight or a pet gets stuck in a previous fight due to a glitch. Go to the main battle page and then click the link called Statistics. You then get the option to continue the fight, withdraw from the fight, or if there is a glitch to get unstuck from battle. Try to finish the fight. If that doesn't work try to withdraw from the fight. If that doesn’t work try get unstuck from battle. You must try to withdraw from the fight before trying to get unstuck from battle or it might not work. Second: Does your pet have 0 health. If it doesn't have health you need to heal it before it can fight again. See above section on how to heal. Third: A pet may decide it doesn’t want to fight if it isn’t well-fed and happy. The easiest way to fix this is to make sure your pet has Hunger: Bloated and Happiness: Very Happy before you try to go into battle. Feeding your pet food will increase fullness while playing with toys will increase happiness. Once you max hunger and happiness you can put your pet into the Lakeview Resort located in Veta Lake and it will keep your pet well fed and happy for a maxim of two weeks. Fourth: You have tried all the ways of getting your pet unstuck, your pet's health is greater then 0 and your pet is well fed and happy. So what's left? It's likely there is a more serious glitch so a User Admin will need to manually delete your fight to free your pet. Click the link called help located at the left hand side of screen to find the link to fill out a ticket. Explain what your problem is and what you have already tried to do to fix it. Your ticket will be sent to the appropriate User Admin to fix the problem for you.

From the basics guide