Be sure to take into consideration the size of your home, your yard or available parks, and, in the case of vocal pets like dogs or birds, how close you are to your neighbors. Remember that many pets will outgrow their original housing or bedding, and need larger quarters. Many people find they are allergic to specific types of animal dander. Cat allergy is most common, but the problem can also exist with dogs, rabbits, rats, mice, hamsters, guinea pigs, etc. Bedding or other cage materials can sometimes trigger allergic reactions.
Birds can carry allergy-provoking mites, molds or pollen on their feathers.
Some people are allergic to molds that can grow in fish tanks, or to the fish food itself. Even reptiles can cause allergic reactions in certain individuals. Try to spend a few hours with your future pet, to see if you get a reaction. If allergies or asthma are already a serious problem, consult your doctor before you make a decision about getting a pet. Different pets require different amounts of care.