In July we bought a collie pup from a nearby farm. Both his parents are working dogs and since we are tired of chasing sheep, we are intending to get him working asap. We've no experience of training a sheepdog but we do have a book

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In the past we have always had German Shepherds. We have 3 now, a neutered male and female and an un-neutered male.
Whilst the collie is destined to be a working dog, he is of course living with the others indoors. It was our intention to get him castrated at about 6 months as we don't want any problems with the entire shepherd or with him escaping looking for a bitch. There are quite a few male collies in this area that seem to go awol from time to time.
My question is, is it likely to have any detrimental effect on his herding instincts? We don't want to end up with a big softee that won't chase sheep!