Remember, an animal should not be seen as merchandise that can be returned because it is not exactly what you wanted. If you lead a very busy life, you may not have the time for a pet. If so, you may wish to wait and make sure that your new residence allows pets. Food, litter, vet bills, toys and other expenses can add up quickly. There are also unforeseen expenses, like serious illness, that can be expensive.
Behavioral problems are more prominent in unfixed animals.
A cat will not use a litter box that hasn't been cleaned for a few days and may starting finding alternative places to go potty. It is absolutely crucial to make sure your cat or dog eats and eliminates waste regularly. If your new pet does not eat or go to the bathroom for 48 hours, you MUST contact your veterinarian. Failure to do so will result in serious illness and perhaps death for your new pet. If you are considering adopting a puppy or kitten, you should recognize that they need a lot of attention.