I recently wrote a blog about safe cycling in the countryside, which included a section about dogs and the problems they cause for cyclists. After this article was published, many a reader got in touch with their own stories and strategies for dealing with these blighters on the road.

Several people suggested the Dog Dazer, an "ultrasonic dog deterrent" which emits a signal that is inaudible to humans, but "unpleasant" for dogs. One press of a button keeps the dog at a safe distance, leaving you free to continue your ride in peace.

But is this the best way to handle hostile mutts? Not according to a spokesperson from the RSPCA, who would be "very concerned about deterrent devices being used to prevent undesirable behaviour, such as aggression, in dogs."

"When a dog uses aggression it is almost invariably because they think that they are under some form of threat. For example, the threat could be to their personal safety, to take away something (or someone) they value highly, or they may feel their territory is threatened.

Using deterrent devices in an attempt to inhibit this behaviour not only fails to address the cause of the aggression (so the dog is likely to remain worried about whatever it is responding to), it may actually worsen aggressive behaviour."

There are mixed reviews online regarding the Dog Dazer, from both cyclists and runners. Some claim that it is a very effective and simple method of protection. Others report extreme reactions in dogs, heightening their hostility and creating a bigger risk.

Here's the RSPCA's advice on how to deal with an unfamiliar dog:

Stop moving towards the dog

Stay calm

Talk to the dog calmly in a pleasant tone of voice

Get something as solid as possible between you and the dog

Watch the dog – but do not stare into his/her face

You may need to move, either behind something or to get away from the dog

Do not make sudden movements or run, just walk slowly away from the dog

That's all very well, but in my opinion, it shouldn't be up to the cyclist to decide how to handle an aggressive dog. Dogs should be kept within the confines of the owner's property, without being given the freedom to run out and attack any passerby. The RSPCA has some great advice for owners of aggressive dogs on their site. If you come across a violent dog, report it to them and the appropriate actions will be taken.

Do you have a method for handling dogs when you're on the bike? Let me know in the comments below.

• Nicola Brady is a film-maker and writer based in Leitrim, Ireland