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　　Although there is still little other published evidence to back up their effectiveness, the anecdotal evidence for seizure dogs like Robbie is strong.

　　"When I am out it is reassuring to know that Robbie will give me a 100% reliable 50-minute warning prior to every oncoming seizure I have - so plenty of time to get somewhere safe," Sally says.

　　The secrets of cow saliva

　　Drool, dribble, or spit. Whatever you call it, saliva can be thought of as disgusting. But many animals lick their wounds, applying liberal amounts of the stuff to try and prevent infection.

　　Saliva across the animal kingdom can have antimicrobial properties - including saliva from the humble cow.

　　Studies have shown that there are proteins in a cow's bodily fluids, including its saliva and milk, that have bug-fighting properties.

　　Image copyright BORIS ROESSLER Image caption Saliva across the animal kingdom has been shown to have antimicrobial properties

　　Salvia also contains proteins - called mucins - that can work to prevent further bacteria entering the wound.

　　Experts don't recommend letting an animal lick your wounds as they could introduce other bacteria, but if you don't fancy that then, luckily, your own spit also contains antibacterial properties.

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