Cookie use on MRCVSonline
We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive all cookies.
If you would like to forward this story on to a friend, simply fill in the form below and click send.

Your friend's email:
Your email:
Your name:
 
 
Send Cancel

Odours ‘can evoke positive emotions’ in rats
"If an animal has to go through a stressful procedure, it could be presented with an odour that it had previously associated with a pleasant context.”
Research finds rats can learn to link smells with positive experiences 

Odours can be used to evoke a positive emotional state in animals, a new study of rats suggests.

An international research team found that rats can learn to associate a neutral odour with a positive experience. Their findings have been published in the journal PLOS ONE.

Rats emit high pitched ultrasonic vocalisations (USVs), which are similar to laughter, when they are happy. This is used to measure their ‘enjoyment’ of being tickled.

Scientists discovered that rats exposed to a neutral odour emitted more USVs when they were subsequently exposed to the same smell without being tickled.

“This suggests that the odour is now able to produce a positive emotional state in the rats and has a number of potential applications, including the use of positive odour conditioning to ameliorate stress in domestic animals,” said Alistair Lawrence, chair of animal behaviour and welfare at Scotland’s Rural College (SRUC) and the University of Edinburgh.

He added: “For example, if an animal has to go through a stressful procedure, it could be presented with an odour that it had previously associated with a pleasant context.”

Two groups of rats were exposed to different different neutral odours (A and B). Researchers then measured the USVs produced by the group of rats being tickled and the control group. Tickled rats produced significantly more USVs on the days that they were tickled, and compared to the control rats.

Both groups were then exposed to three odours, an unknown neutral odour, extract of fox faeces, and either odours A or B. Tickled rats emitted more USVs when they were exposed to the odour they had already been exposed to when tickled.

Vincent Bombail, research scientist at the National de la Recherche Agronomique, said: “This is a novel method for positive/appetitive conditioning without the use of drug or food rewards. It is a fascinating foray into the world of positive emotions, which was enjoyable for the rats, as well as all the experimenters involved.”

Become a member or log in to add this story to your CPD history

Celebrity chefs urge public to get baking to support Cats Protection fundraiser

News Story 1
 In support of Cats Protection's Pawsome Afternoon Tea fundraiser, Masterchef winner Tim Anderson and Great British Bake Off star Kim-Joy have shared biscuit recipes to help keen bakers raise money for needy cats across April.

The celebrity chefs are both cat owners and have said that they hope this fundraiser will help to raise awareness of cats in need and the importance of adopting a cat, rather than buying one.

This is the fourth year Cats Protection has run its Pawsome Afternoon Tea campaign, which encourages people to hold tea parties, bake sales and fundraising events to help raise money for the charity.

To view the recipes and other fundraising resources please visit the Cats Protection website. 

Click here for more...
News Shorts
BEVA offering free membership to vet students

The British Equine Veterinary Association (BEVA) is offering free membership to veterinary students. As part of a new initiative with the aim of encouraging more veterinary professionals into equine practice.

According to BEVA, less than one in ten veterinary students choose to work in equine practice. The association hopes that this initiative will provide insight into the field and the benefits of a career in equine medicine.

Benefits of membership include:
▪ access to a network of nearly 3,000 members
▪ special student rates to attend BEVA Congress
▪ online access to BEVA's Equine Veterinary Education (EVE) journal
▪ free access to the association's online learning platform
▪ free access to BEVA's practical veterinary apps
▪ exclusive discounts on a range of things from cinema tickets to grocery shopping.

BEVA will be releasing a series of short videos over the next few months from BEVA Council members, explaining what inspired them to work in equine practice.

Image (c) BEVA.