Our expert says:
Dog Behaviour Expert
Hi Eve, nice to hear from you and the reason why this behaviour is happening now is that both dogs are at the adolescent age where sex and hierarchy become important to them.
Personally, I would sterilize both dogs immediately. At this age it can take between 6 weeks to 3 months for the testerone levels to drop completely as the majority of male dogs have the highest testerone levels at about 8 months. this is often when fighting etc will start.
Additionally, sterilizing them should ensure a happier relationship between them and they will not be a threat to other dogs as they smell differently. It will prevent 'marking' from happening and you will be cutting down on the possibility of prostrate and testicular cancers etc. I really do believe that unless you are a 'professional' breeder that it is only responsible ownership to sterilize. 'Mistakes' do happen and the dogs will be a lot happier and less frustrated and bond more with you. Hope this helps, thanks Scotty
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