We had our Bichon castrated in October last year and now I am beginning to wish that we hadn't.   Everytime we went to the vet they were asking when were going to have him castrated although I told them I weren't sure because he is only a small dog and not likely to cause any problems with aggression but they told me how he would probably get cancer and that it was much better for his health if he was done.

We were also having a problem with him humping everything, my daughter, blankets etc.  The main reason that I decided to have him castrated was because he has got skin problems which he is back and forwards to the vets with and someone advised me to have him castrated because it may help his hormones and sort out his skin problems once and for all.  He does seem a bit better (he had pulled all the hair out of his back end once) and scratches his ears still but not as much as he did  although I am aware that he might go worse again in April when the pollen is around again.

My problem now is that everytime we come across an uncastrated dog they will not leave him alone and jump all over him and I am worried sick that they are going to really hurt him.   Today we encountered a Labrador which we tried to avoid but it must have found out where we was and just appeared out of nowhere and started to jump all over him and threw him onto his back in the mud and he yelped.  The owner was some way off and I had a real fight on my hands to try to control the dog and hold mine as well because my dog was terrified.

I thought I had seen this problem before on Champdogs so I did a search and came up with feminisation syndrome and this is what he appears to have.
Castration has spoilt his life now it seems because it is going to be like having a bitch in season all the time.  I really wish I hadn't had him done.   I phoned the vets and they said they have never heard of this before and just recommended that I took him in for a check-up and a sample of urine, although reading the reply by Jackie H in February last year, it doesn't look like much can be done about the problem because I don't want him on HRT for life.

My Jack Russell x was castrated at 6 months on the vets recommondation as he kept humping the cat. Mind you the cat was a young entire male and they would take turns humping each other. He still humps when he gets excited although not the cat but he doesnt mind whether its a dog or bitch if he gets excited and wants to play he humps and he is now 12 years old. I have found it is easier with other dogs because a few of the dogs I walk with are entire males and are male dominant but they are not sure whether my dog is arthur or martha so they leave him alone. I cant say that hes ever been jumped on though.