Our expert says:
Dog Behaviour Expert
Hi Chris, without a lot more background it really is difficult to say. Sterilization normally helps to reduce reactive behaviour, put it can take between 6-12 weeks for hormonal levels to adjust and then there are no guarantees.
A lot will also depend on the sex of the dogs. In males it is often sorted out a lot easier than with females. On average two females should never be kept together, especially if not sterilized. What happens so often is that dogs are fine together till about 6-9 months (depending on breed and dog) and then the adolescent period kicks in and two dogs that were best friends can start fighting seemingly overnight (although there are signs that an owner may not pick up on that trouble is brewing.
Sterilizing dogs is only responsible dog ownership and helps to lower the stress levels, improves bonding and cuts down (and out) on a lot of cancers that intact dogs are prone too.
You also need to raise yourself in the combine human/canine pack structure to be able to prevent reactive behaviour from happening.
All reactive behaviour MUST be seen by a professional - to try and give you assistance by email is a bit like me trying to teach you to scuba dive by correspondence - dangerous!
What you can start doing to raise yourself up in the hierarchy is read through the link to the article below on House Rules and start brining them in.
You need in-house help and as soon as possible to make sure this situation does not get worse. Please get in touch with me at email@example.com with where you live and I will put you in touch with a qualified behaviourist. Link to article to get started is
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