Write an article based on this "Recognize cage protective behavior. Learn the signs of a bored rabbit. Identify the signs of a rabbit in heat. Address nipping behavior. Know when to see a vet."
Some rabbits become territorial due to sexual maturity. However, other rabbits simply become aggressive if you reach into the cage or try to remove the rabbit from his environment. Other signs of cage protective behavior include biting you when you try to clean the cage or remove his food or toys. Rabbits need to feel like they have a safe space, which is most likely the cage. Reaching into the cage could be seen as a threatening act. Instead of reaching into your rabbit's cage to pull him out, try leaving the gate open and letting him come out when he's ready. Some rabbits resort to biting out of boredom. Much like a nagging child who pulls on your arm and cries until you pay attention, your rabbit's biting may simply be caused by boredom and not getting enough attention. Spend some time each day petting your rabbit or playing with him (if he'll let you). Consider getting a second rabbit to keep your bunny company. If you do this, however, you should ensure that both rabbits have been desexed to avoid aggressive competition. Make sure your rabbit gets plenty of exercise time outside his cage. Try to play with him, or simply let him romp around and explore a bunny-proof room. If your rabbit has reached the age of four or five months old and developed aggressive biting habits, it's possible that he's reached sexual maturity. This can mean that the rabbit is in heat, and may continue to act aggressively until he is desexed. Spraying urine is a common sign of being in heat, as well as the rabbit plucking its own hair (though this may be more common in females than males). Grunting, growling, and biting may be related to sexual behavior, though there could be other explanations. Talk to your vet or a qualified animal specialist if you're unsure of your rabbit's developmental stage. Some rabbits will nip at you when you try to discourage destructive behavior. This usually indicates irritation or a desire to be left alone, especially if it comes as a response to touching or moving your rabbit. Nipping may simply be a cry for attention. Try guessing what your rabbit might need (petting, food, water, etc.) and see if that stops his nipping. Typically, if your rabbit is nipping, it's to give you a warning. The easiest way to deal with a rabbit that wants his space is to leave him alone or put him back in his cage. Any time your rabbit's aggression or biting becomes a problem, you should talk to your veterinarian for advice on how to proceed. If the rabbit has already been desexed it could be a behavioral problem, perhaps related to previous mishandling, mistreatment, or even abuse. It could also be an underlying health problem that's causing your rabbit to act out. Your vet will be able to give you more concrete advice based on your rabbit's health history, adoption history, and a comprehensive physical examination.