Something to get you started. Don't know if the links will be active this way:
Regarding neutering, the science now seems to lean to leaving a male intact, with some exceptions.
A link to a very long article below from a previous post on this subject:
Benefits and Risks of Neutering–An Evidence-Based Approach | The SkeptVet
and this is the link to an even longer paper by the same author:
Excerpted from the conclusion:
"In male dogs, the individual benefits of castration are not clearly greater than the risks. In the absence of established problems with aggression, roaming, or prostate disease, it does not appear that neutering has predictable health benefits for individual dogs. And while the potential of increased cancer risk appears less significant for males than females, other breed-specific risks, such as that of cruciate ligament disease, are likely greater in neutered males. The population benefits, of course, argue in favor of routine neutering of male dogs. However, in terms of individual health, a strong case can be made for not
routinely neutering male dogs."
Mine are mini's. We decided to neuter just after 1yr, when they'd pretty much reached physical maturity. The loss of those hormones too soon can adversely affect many body systems, some sooner, some later. In the research I've done online, it seems to me that the loss of the hormones, especially too young, might be the catalyst for a lot of the problems. If neutering is a possibility, or even if required by contract, etc, waiting til physical maturity is reached (age varies) gives your pup the best chances.
Ok this link should get to the blog and the other links:
A general internet search for neutering male poodle should bring more results backing this position up.