AbstractRats were give powdered food for 24 h and one of the following six conditions: water, 0.0025%, 0.005%, 0.01%, 0.04% quinine solutions, and no liquid, to study whether rats drink in excess of apparent water need induced by dry-food eating. Quinine solutions were used to discourage habitual drinking in excess of apparent water requirement. The results indicated that there was no excess water intake when rats were given dry food [although Morrison (1968) showed rats drank in excess when food deprived]. The efficiency of a liquid to consume dry food was found to be constant’ from water up to 0.01% quinine solution. Low efficiency of 0.04% quinine solution may be due to small amount of intake of the solution. This low intake level of 0.04% quinine solution may be sufficient to correct the dehydrated state produced by eating dry food but not enough to produce additional eating. Show References
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Additional informationThis investigation was supported by a research grant (MH 15530-01) from the National Institute of Mental Health. We thank Eldonna Fisher for editorial and secretarial aid. Rights and permissionsAbout this articleCite this articleHsiao, S., Lloyd, M.A. Do rats drink water in excess of apparent need when they are given food?. Psychon Sci 15, 155–156 (1969). https://doi.org/10.3758/BF03336254 Download citation
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Learn how much drinking water pet rats need in this Howcast rat video featuring veterinarian Anthony Pilny. TranscriptProviding water is important for your pet rat, as well as feeding them properly. What is most convenient and what most people do is just get an appropriate type of water bottle that hangs on the cage that they can provide to allow the rat to drink water at will, or to be able to drink as much water as they need throughout the day. It's really important as well, in some rats, to make sure that they will accept and drink from the water bottle, they will all learn to use a bottle, but some rats actually prefer water bowls and prefer to have dishes as well. In some instances, it's recommended just to have both. There isn't really a concern with a rat having access to water as long as it's freely available. What tends to be really important is that you make sure that your rat is not over consuming water. The over consumption of water in a lot of rats could indicate serious medical problems like kidney disease, and it's really important that you're aware of how much they generally do need to drink so that you're paying attention to how many times you're refilling that water bottle. The other thing that's really important is that you keep the water bottle very clean. Sometimes rats will backwash when they drink from them. The water bottles with stagnant water in them can become pretty dirty, so it's important that you keep the water bottle or water bowls very clean in your enclosure. If you choose to offer only a bowl and not a bottle, understand that they may get their bedding in it, they may get food in it. The water can become contaminated and get pretty dirty, and this is why it's recommended to use a water bottle hanging on the cage as well, as the primary source of water. Rats will randomly or intermittently drink throughout the day depending on the type of diet they're on. There are mathematical calculations and ways to determine the average amount of water that a rat needs, but a healthy adult rat generally will be able to get water as needed as long as it's always available, and the only concern really would be if you notice that your pet rat is excessively drinking water, then you'll want to seek veterinary advice. So overall it's important to keep an appropriate size water bottle. Keep it very clean. Keep it full. In some cases offer a bowl and make sure that your rat is drinking water normally. How often does a rat drink water?On average a rat may need 10 to 12 ml of water per 100 grams of body weight per day. For an average rat this may equal around 30 ml or 1 oz of water per day, with variation based on the individual animal's needs, the environment, and the type of feed being provided (dry feed requiring more water).
Why are my rats drinking so much?Excess drinking occurs when rats are food deprived (Morrison, 1968), but present results indicate no excess drinking when rats are given dry food.
Why do rats drink water?All animals need water to survive, and rats are no exception. Some animals do not need to drink very much because they eat high water content foods that fulfill their hydration needs. Unfortunately for rats, they do not have this capability. They have to drink water to survive.
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