https://www.vetnurse.co.uk/f/clinical-discussions/8215/suprelorin-contraceptive-implant Hello, does anyone routinely use this in their practice, I have a large entire male 14months old, that hasn&#39;t really shown me major cause for concern re aggresion so far, but he is protective over our other dog, (ESS bitch - neutered). We do show himen-USTelligent Community 10https://www.vetnurse.co.uk/thread/80563?ContentTypeID=1Sat, 01 May 2010 12:54:00 GMT1a0763ec-3885-442c-853e-6cef656dfec5:fcf6dd26-4ec3-488c-9cf6-72fa96a4d0e9Fiona Leathers<p>We have just used it for the first time on a young dog, who the owners may breed from, but is aggressive with other dogs.&nbsp; If it helps with the aggression they may decide to castrate him rather than breed from him.&nbsp; Always reckon that aggressive dogs shouldn&#39;t be bred from as 50% of the genes come from the father!!</p><div style="clear:both;"></div>https://www.vetnurse.co.uk/thread/79793?ContentTypeID=1Sun, 25 Apr 2010 16:44:15 GMT1a0763ec-3885-442c-853e-6cef656dfec5:916e4524-b1a8-425e-826b-b87d489aee64StephSVN<p>Hi,</p> <p>Not really sure if this will be much help, but Sarah Heath recommended one of our clients used this...he was a VERY fear aggressive rhodesian ridgeback and she recommeneded this as it gives a clear indication of the effect surgical castration will have - rather than Tardak which can affect behaviour in itself rather than just being a result of the hormone changes.</p> <p>His was a very different situation to yours, as it was possible castration would have made this dog much worse which is why we needed to be sure before surgery. The outcome in our case was that it didn&#39;t have any major effects, but definitely no worse so we went ahead and castrated him.</p> <p>I would have thought its worth a go to see if castration would actually affect the very specific behaviour in your case, rather than losing out on being able to show him only to find it doesn&#39;t change his behaviour towards your bitch.</p><div style="clear:both;"></div>