This always makes me a little bit itchy.. If you don't like the normal behaviour of a dog… don't take a living creature, but buy a toy version in a toy store...
I agree with you that when there is an over population, you have to do something.. But it's still important to research the consequences. The positive and the negative ones..
And about the obesitas.. They did research on living animals and had these results.. so there has to be some truth in it..
Like I said, there is not reason to have to keep an animal in tact…. it becomes a personal decision as there are pros and cons both ways... and it is not necessary to have to "live" with in-tact dogs.
And I never said that there was no truth (spay/neuter leading to obese dogs) to it, only that I don't believe it is the "biggest" reason for overweight pets... If they had a spayed/neutered dog that became overweight, how would they know if left in-tact it would not have done the same? I believe that obese dogs are more the fault of the owners period... and their feeding habits. All of mine are now spayed/neutered. All done at different ages. Male at 3, one bitch at 3, one bitch at 5, one bitch at 4(now deceased at age 16 3/4), one bitch at 6 and they were never overweight. My one bitch who was spayed at 6, when in tact was at different times overweight... and it was due to the feeding/activity level (and easy enough to correct).
I do agree with waiting if possible until they are a year to spay/neuter or at least make sure the growth plates are closed, however that said, when I place a pet and the owners want to have it done before the bitch goes into season, I do not have any problem with that.