Our adult dog is having a few issues with some neutered males we meet who will approaches my him and start to growl and often try to mount him. My dog will usually walk away, but the other day he did react and gave the dog quite a telling off. I really don’t want a repeat of this.

After a check up at the vet to see if there was any medical reason of this, the vet said it was more likely to be a reaction to him being entire. They have suggested suprelorin to see if there is any change.

I was just wondering if anyone else with an entire male has experienced similar problems with neutered males? Or if anyone who has used suprelorin has found that other dogs reacted differently to their dog after the implant?

It's usually the other way around, neutered dogs attract males who want to mount them.

I would suggest that the neutered males he meets were done young and are stuck in this juvenile phase.

I don't think neutering your boy will help, as it will likely make him more of a target.

I think the bigger question is where you are walking to be in the situation that other dogs are able to come up and interact in this way when you don't want him to meet them (presumably). 

It's very rude for other dog owners to allow their dog to come up to yours if yours is on leash or even right next to you and off-leash.  You need to be really protective of your entire male dog whilst he is young, so that he doesn't learn that other intact males are a threat.  Avoid them and ensure he has positive experiences only until he is into adulthood... by which time his personality will be largely fixed...

> You need to be really protective of your entire male dog whilst he is young, so that he doesn't learn that other intact males are a threat.  Avoid them and ensure he has positive experiences only until he is into adulthood..

This is very important, even if it means you need to keep him on lead or a long line for 6 - 12 months

I think it has become more and more of a problem that owners are allowing their unleashed dogs to come over to your dog when it is on a leash, they genuinely think it is ok and that all dogs will play nice together.  I always ask people to keep their dogs away from my intact males and explain that they can be reactive or in the case of one of my dogs he regularly gets bitten by neutered males and never retaliates but unfortunately in most instances their dog still comes over, might only be for a few seconds but can be sufficient to cause a negative reaction.    I don't really understand why owners have their dogs off leash when say on a village high street and the dog is walking next to them.  I think it is ego "look at how well I have trained my dog - don't need a leash on a busy road me".  People do forget that in a 30 mph limited road it is illegal to have your dog off a leash.  I have also had several altercations with people in fields when their dogs have been allowed to bound over to mine again whilst on a leash without any attempt to call them back and I always have to shout for them to call their dogs off.   Turns a nice walk into an unpleasant one.   I have also had someone say that I shouldn't take them in a field if I can't let them off leash, apparently open fields are only for unleashed dogs.  Another said that I should let my dog off leash so that the dogs can "sort if out" for themselves.  I am sure that it is annoying for some dog owners who don't have good recall but with good recall we can all get along marvelously.   It has caused many an argument especially in the last few years and I seem to have come across more than my fair share of numpties where this is concerned.  One of mine bitten twice at a young age is taking a very long time to get his confidence back so avoiding negative reactions is really important at a young age as is counter-conditioning for dogs that have become fear aggressive.