If you care for both a guinea pig and hamster, you may wonder if they would make good friends to each other. Hamsters and guinea pigs might seem similar in some aspects. But should you house guinea pigs and hamsters together in the same cage? While it might at first seem a bright idea to some, here's why this long-time animal nurturer and pet parent says "absolutely not!"

Dietary needs differ significantly. While there may be some similarities since both animals are in the rodent family, what they need to much on all day is not exactly the same. Some selections, such as carrots, are the same. But others are very different. Also, the makeup of hamster food differs from that of guinea pig food. If both foods are available in the cage, there is no telling which each animal will pick. This could cause nutritional deficiencies, as well as overdoses or exposure to harmful food for either animal. Neither should eat the other's food. But they likely will, if available.

Territorial habits may cause difficulties. Both animals like to claim their space and do what they please with it. Many hamster breeds are extremely territorial. Most cannot even be housed with other hamsters due to this issue. Just imagine what they will think and do when something big (and possibly scary) moves into their house. It's not going to be very nice. Your hamster might simply hiss at the guinea pig and hide. The guinea pig may let out some squeaks of warning. On the other hand, either could react badly as well. Both animals like to kick and bite when they get upset, especially over their territories. While some may get along as playmates, it's not very common and they should never be left alone (and most likely, not even supervised) in the same confines.

Unfair match-up plays a role. Remember that guinea pigs are much larger than hamsters. Even though guinea pigs are more docile, the do still have sharp teeth. Neither of these animals is carnivorous. However, if your guinea pig is bitten by the hamster or otherwise threatened, there is no competition. A guinea pig's size immediately gives him the advantage. Housing hamsters and guinea pigs together is a very unfair mix. Take a look at your hamster's teeth. Yes, they are sharp. But also glance at your guinea pig's teeth. There should be no question at all who would win in a showdown.

Different cage needs can pose a problem. The bar spacing of hamster and guinea pig cages are not equal. Guinea pig cages have much wider spacing, from which hamsters can easily escape. They love climbing. Because of that, someone might opt to put both animals in a hamster cage instead. Think again. Hamster cages are not large enough for guinea pigs at all. On top of that, they are not built for guinea pigs, who may escape. What about a large aquarium? Even if you house these animals together in an aquarium or other cage that can contain both, there are still all of the other factors mentioned.

Varying behavioral instincts can spell trouble. Many hamsters are nocturnal creatures. This means they are active mostly at night and will be sleeping much of the day. Guinea pigs, on the other hand, are diurnal. This means that when your guinea pig is running around squeaking up a storm, it will interfere with your hamster's sleeping time. The same goes in reverse. It's doubtful the guinea pig will appreciate a hamster rooting around his area when he's trying to sleep. Also, each animal likes to keep special areas for everything in their cages. If these areas conflict (for instance, the hamster tries to store food where the guinea pig wants to sleep), that could create a serious problem.

*I originally published a version of this via Yahoo Contributor Network

You're holding your guinea pig, who squeezes closer to you and it sounds like he is purring. But only cats purr, right? Do guinea pigs purr? Yes, they most certainly do emit a purring sound. But is it really a purr and what does it mean? Is your guinea pig happy, sad, angry, or otherwise when he makes this noise? I had guinea pigs as a child and so have my own kids.

Do guinea pigs purr? Yes. Guinea pigs do in fact purr. They may do it when you are holding them. They might also do it when eating carrots or their favorite treat. The purring could be directed at an object, another guinea pig, or even you. One child's science fair project actually proved an expert wrong regarding the guinea pig purr. The expert believed that only cats have a 'true' purr, which is not true in our experience. All of our guinea pigs have always made the purring sound.

What does it mean when my guinea pig purrs? This can actually mean several things. The most common meaning of a guinea pig purr is happiness. But that is not always the case. It can also indicate fear, fright, and more. Deciphering each purr requires being attentive to your pet, as well as listening to the length and pitch of the purr.

Which guinea pig purrs are a good sign? If your guinea pig's purr sounds long and deep, he is likely very content and comfortable. Our guinea pig usually does this when someone holds him close and talks to him. Happy purrs are not always long. But they are generally accompanied by overall calmness, such as posture and attitude. Pay attention to what else your guinea pig is doing while he purrs like this.

Which purrs should I worry about? Short and possibly higher-pitched purring noises could be a sign of pain or fright. These are not good. Higher voice pitches while purring can be an indicator of being annoyed. If your guinea pig is doing this toward you, leave him alone for a while. If it's toward another guinea pig, separate them until they've both had time to settle down. Guinea pigs like attention from each other and even from you. But sometimes they also need to be alone.

How can I make my guinea pig purr? The best way to entice purrs from your guinea pig is to keep him happy. Stroke his ears. Pet his back softly. Talk gently to him often and hold him close. Give him treats as recommended. But most of all, just show him you love him and he will do the same in return, which may result in purring.

*I originally published a version of this via Yahoo Contributor Network