My boy Falco is 16 months and not yet Neutered. One of his testicles never dropped. I was wondering your thoughts on this, any issues leaving him as is? The last time I took him to the vet for this issue he said i shoud wait til he's 18 months. I dont know around what age they are in heat, but he has not really displayed any leg or other form of humping except a few months back.