Don't know when your dog had the chop but it can take a few months to be effective and even then it's not guaranteed to stop the 'humping'.
We have neutered GSDs that don't care a bit when our Shih Tzu comes into season but we also have a neutered Yorkie who's 13 and 'rides the face off her'. Yuk! Such uncouth words.
Some it works on, others it doesn't. I believe that the age they are when they're neutered can make a difference too.
It could also be simple dominance. Neutering may stop the compulsion but it won't stop instinct. Make sense? Not sure it does even to me but I know what I mean. Those blasted Pre historic frogs, Lizzards and Anacondas have addled my brain.
Life isn't about waiting for the storm to pass, it's about learning to dance in the rain.
http://thetenaciousgardener.blogspot.co.uk/
Bookmarks