I'm really sorry to have to say such things, but you clearly don't know what you are talking about. No correlation between udder size and milk production, so yo

I'm really sorry to have to say such things, but you clearly don't know what you are talking about. No correlation between udder size and milk production, so you can clearly try to orientate your production towards nice shaped udders. Especially crucial with milking robots anyways, so that's going the right way. Each bull and its offspring has genetic testing to try to give such indicators. See https://issuu.com/eurogeneais/docs/spring_2016_low_res https://issuu.com/eurogeneais/docs/spring_2016_low_res for an example, you can see udder there amongst other regarding milk of course but also posture, with positive or negative factors. The skeletal problems are 1 - not the most common factor of reform, and not really that common 2 - not hereditary most of the times but come from housing and such. The average is certainly not 3 years but a bit higher, around the double actually, as at 3 years you barely had the time to end the first lactation, which is the worst one for milk production. Antibiotics are needed because of the environmental pressure and modern breeding methods more than genetic factors, by far. Honestly you just threw a bunch of non-sense about a field you clearly don't know at all. I really would like to know how people can have such vigorous claims about things they don't know an ounce about. As for your dog you're proving my point : hereditary diseases are a big thing in purebred and you sadly got one that wasn't from a very clean pedigree (honestly Belgian Shepherd are by the way really far from the worst breed in that aspect btw so either you're unlucky or you didn't search too much for a good breeder before acquiring your pet). But good breeders now are systematically testing reproductors and offspring for well known diseases in each breed and it helps reducing their incidence.